【題目】The living room is clean and tidy, ________ a dining table already laid for a meal to be cooked.

【題目】Most people think that it is _____ to spend some time surfing the Internet, but we shouldn’t be too dependent on it.

【題目】---Did you remember to take the key to Tom?

【題目】This kind of material can be used to plastics.

【題目】It is believed that a new kind of drug _____ by the scientists and they are hopeful that they will succeed in a few months．

【題目】— Do you let your kids travel by themselves at night?

【題目】The engineer ______my father works is about 50 years old.

【題目】It takes a long time to restore nature_______ it is damaged．

【題目】The plane flew ______ in the sky and the people spoke ______ of the experienced pilot.

【題目】Yesterday we went to the library to do some reading， only to find that it ______．