1.The current political ______ of our country is favorable for foreign investments.

　　A.climate B. weather C.temperature D. state

　　Best Answer:A

　　详解：应选A项。climate(可数名词)意为“(一个地区或一个时期总的)气候”;weather意为“(指每日每时的晴阴，温度)天气”;state意为“状况，状态”。

　　2.The angry teacher gave the order that nobody ______ the classroom before twelve.

　　A.would leave B. left C.had left D. leave

　　Best Answer:D

　　详解：应选D项。that引导order(命令)的同位语从句，从句用(should)do表示虚拟语气。

　　3._____ the financial means to remain independent, Thomas Edison was compelled to seek employment as a night telegraph operator.

　　A.He was deprived of B. Deprived of C.That he was deprived of D. Although he was deprived of

　　Best Answer:B

　　详解：应选B项。过去分词表原因作状语，句意为：失去了保持独立经济来源，爱迪生不得不当夜间电报员。

　　4.The firm will have to step ______ production if it is to defeat its competitors.

　　A.off B. in C.out D. up

　　Best Answer:D

　　详解：应选D项。step up意为“提高，加快”;step off意为“开步走，步量(距离)”;step in意为“介入，干涉;参加进来(帮忙)”;step out意为“走出去”。

　　5.After writing poetry unsuccessfully for several years, he was not certain whether to quit or ______ with his art.

　　A.if he should continue B. he should continue C.to be continued D. to continue

　　Best Answer:D

　　详解：应选D项。to continue与to quit并列。