With the development of science and technology, people’s life _______ in the past few years.

A. improved       　　　　　B. has improved

C. is improving   　　　　　D. had improved

__________ __________ (把东西都放好)everything before you leave the laboratory.?

The enemy troops were not able to ____ back because their way to return had been _______by us.

A. fall, cut off　　　　　 B. feel, cut away

C. fell, cut down　　　　 D. felt, cut out

—Don’t forget to visit me when you come to Beijing.

　—______.

　　 A. I don’t　　　 B. I won’t　　　 C. I can’t　　　 D. I haven’t

The school shop, ________customers are mainly students, is closed for the holidays.

A. which　　　　 B. whose　　 C. when　　　 D. where

The education of 　　　young is always 　　　 hot and serious topic in modmern society.

　 A．the; /　　　 B．a; the　　　 C．/; the　　　 D．the; a

The two workers have been _______ (非法) discharged.

我们必须保护环境。

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