閱讀下面短文，從每小題所給的A、B、C、D四個(gè)選項(xiàng)中選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

　　The ice sheets covering the Arctic seas have thinned noticeably over the last seven years, most likely due to global warming. Melting polar ice means a rise in global sea levels, which translates into likely disaster for many coastal cities.

　　Boerge Ousland, a Norwegian explorer, made the alarming discovery while skiing alone across the top of the world in the winter of 2001.The extremely tiring trip lasted 82 days and took Ousland 1, 300 miles along the northern tip of Russia to the North Pole and down through Canada.

　　Along the way, the 38-year-old explorer measured the ice thickness as part of an ongoing study by the Norwegian Polar Institute. He compared his latest results to a similar voyage back in 1994.In some areas, he noticed that the ice had thinned by as much as a meter.

　　Ousland said he noticed other changes in the Arctic since his last visit, including a greater number of polar bears closer to the North Pole. One explanation could be that the bears need to travel further to hunt seals. The seals in turn have been driven from their own environments because of the thinning ice along the Pole's edges.

　　Ousland also reported seeing large pieces of driftwood from Siberia very close to the Pole. This is yet another sign that the ice is much thinner than usual.

　　The thinning ice also sets a more direct danger to Arctic explorers. Just before Ousland set out on his trip, a Japanese Polar explorer, Hyoichi Kohno, drowned after falling through the thin ice at one point less than a mile from where Ousland was.

1．Global warming is the cause that ________.

[　　]

A．makes the ice sheets cover the Arctic

B．melts the ice so that the sea level rises

C．causes danger to the world cities

D．has no connection with the tinning of the Polar ice

2．The average for the Arctic ice to melt is about ________ per year.

[　　]

A．more than l0 centimeters

B．less than 10 centimeters

C．a(chǎn)s much as 1 meter

D．a(chǎn)s much as 8 meters

3．From the passage we may know the fact that ________.

[　　]

A．there used to be a lot of polar bears close to the North Pole

B．the seals were driven to travel further north by the polar bears

C．driftwood was seldom seen so near the Pole in the past

D．the thinning ice along the Pole's edges carried the wood to Siberia

4．What is not true according to the passage?

[　　]

A．Boerge Ousland took the trip because he liked skiing.

B．Boerge Ousland works for the Norwegian Polar Institute.

C．Thinning ice makes it more dangerous for Arctic explorers.

D．If Hyoichi Kohno had traveled a mile away from his route, he wouldn't have died.

　　Gestures are the“silent language”of every culture. We point a finger or move another part of the body to show what we want to say. It is important to know the body language of every country, or we may be misunderstood.

　　In the United States, people greet each other with a handshake in a formal introduction. The handshake must be firm. If the handshake is weak, it is a sign of weakness or unfriendliness. Friends may place a hand on the other's arm or shoulder. Some people, usually women, greet a friend with a hug（緊抱）.

　　Space is important to Americans. When two people talk to each other, they usually stand about two and a half feet (69 centimeters) away and at an angle, so they are not facing each other directly. Americans get uncomfortable when a person stands too close. They will move back to have their space. If Americans touch another person by accident, they say,“Pardon me,”or“Excuse me.”

　　Americans like to look at the other person in the eyes when they are talking. If you don' t do so, it means you are bored, hiding something, or are not interested. But when you stare at someone, it is not polite.

　　For Americans,“thumbs up”means yes, very good, or well done,“Thumbs down”means the opposite. To call a waiter, raise one hand to head level or above. To show you want the check, make a movement with your hands as if you are signing a piece of paper. It is oil right to point at things but not at people with the hand and index finger（食指）. Americans shake their index finger at children when they scold them and pat them on the head when they admire them.

　　Learning a culture' s body language is sometimes confusing. If you don't know what to do, the safest thing to do is to smile.

(1) From the first paragraph we can conclude that ________.

[　　]

B．gestures can help us to express our meaning

C．we can learn a language well without body language

D．only American people can use gestures

(2) If you stay in the United States, you should ________.

[　　]

A．shake your friends' hands all the time

B．shake your friends' hands with your eyes looking up

C．greet your friends in a polite way

D．greet a girl friend by putting hands on her shoulders

(3) In the United States, people often ________.

[　　]

A．show their friendship by touching each other

B．show their friendship by glancing at each other

C．say“Pardon me”to each other in a talk

D．get nervous when you stand too close to them

(4) If you talk with an American friend, it' s polite for you to ________.

[　　]

A．look up and down

B．look at him in the eyes

C．hide your opinion

D．look at your watch

(5) When your friend gives you a thumb-up, he, in fact, ________.

[　　]

A．shows his rudeness to you

B．shows his anger to you

C．expresses his satisfaction to you

D．expresses his worries about you