2. I missed a _____________ opportunity to become a millionaire.

　 A. gold　　 B. golden　　 C. handsome　　　 D. generous

1. --- Do you understand?　 --- Yeah, we’ve ________ it

　 A. got　　 B. gained　　 C. grasped　　 D. guessed

3．單項選擇

2．詞形變化

1)　　　　 No pains, no ____________ (gain).

2)　　　　 _____________ (general) speaking, the more expensive the MP3 player is, the better it is.

3)　　　　 He is a ____________(gift) musician.

4)　　　　 The chemicals are ___________________ (harm) to the environment.

5)　　　　 The guilty man was ____________ (hang) for murder

6)　　　　 As the weeks passed, I ____________ (gradual) accepted the idea of him leaving.

7)　　　　 Money is not the key to ______________ (happy).

8)　　　　 Vitamins are important for healthy ___________ (grow).

9)　　　　 I was looking forward to working under her expert ____________ (guide).

10)　　 Ducks, _____________ (goose), chickens and also pigeons were kept on the farm.

1．單詞拼寫

1)　　　　 We parked our car in an underground g__________ near the hotel.

2)　　　　 I feel really g______________ at forgetting her birthday again.

3)　　　　 After g_______ from high school, Jayne went to engineering college.

4)　　　　 The fight started when one of the fans made rude g_______________ at a player.

5)　　　　 My friend offered to pay my plane fare, which was very g___________ of him.

6)　　　　 The f__________ (葬禮) will be held at St. Martin’s Church.

7)　　　　 I helped him choose the f___________ (家具) for his house.

8)　　　　 The boy likes eating h____________ (漢堡包) in KFC.

9)　　　　 The g_______________ (政府) has promised to cut taxes.

10)　　 Of all the courses, we like g_______________ (地理) lessons best.

程序每執(zhí)行一次循環(huán)體，循環(huán)條件中涉及到的變量就會發(fā)生改變，正在步步逼近滿足跳出循環(huán)體的條件。

程序中最忌“死循環(huán)”。所謂的“死循環(huán)”就是指該循環(huán)條件永遠成立，沒有跳出循環(huán)體的機會。

請看我們用WHILE循環(huán)實現(xiàn)1到100累加為例，做一下說明：

“1+2+……+100”

部分程序如下：

sum = 0

i =1

WHILE 　i <= 100

sum = sum+ i

i=i+1

WEND

這段程序中，循環(huán)的條件是“i <= 100”；因此，一開始i肯定需要一個確定的值。前面的

　“i = 0”這一個語句，在聲明變量i的同時，也為i賦了初始值“1”。這樣，條件 i <= 100 得以成立(因為i為1，所以 條件“i <= 100” 當然成立)。

3．學習了循環(huán)語句的兩種格式，我們來挖掘一下應用循環(huán)語句編寫程序的“條件三要素”。

2．條件語句的主要功能是來實現(xiàn)算法中的條件結構。

因為人們對計算機運算的要求不僅僅是一些簡單的代數(shù)運算，而是經(jīng)常需要計算機按照條件進行分析、比較、判斷，并且按照判斷后的不同情況進行不同的操作和處理。如果是要解決像“判斷一個數(shù)的正負”、“比較數(shù)之間的大小”，“對一組數(shù)進行排序”、“求分段函數(shù)的函數(shù)值”等很多問題，計算機就需要用到條件語句。