课时作业(三十四)　[选修7　Unit 4 Sharing] (限时：45分钟)Ⅰ.单项填空________ body heat exactly to maintain their ideal temperature despite changing weather.

　　A．respond

　　B．attach

　　C．adjust

　　D．expose

　　2．Your nationality is not ________when choosing a career，but your ability to speak the language is.，________，tries to encourage people to turn on life.________ in the world trade more frequently，the world economy is developing more rapidly and steadily.________come.He said he wasn't certain what his plans were.

　　A．must not

　　B．need not

　　C．would not

　　D．might not

　　6．If you________a mistake in reviewing the report，please bring it to my attention.come across

　　C．come around

　　D．come about

　　7．Ronny's steps________，and there was a moment of absolute silence.________ so that we failed to see the danger was coming.

　　A．security

　　B．authority

　　C．responsibility

　　D．variety

　　9．You can't see well through a telescope unless it is________correctly to your sight.

　　A. accustomed

　　B. adjusted

　　C. admitted

　　D. adopted

　　10．—Don't you know your computer has been infected with viruses?

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