27. A mysterious illness, referred to as a typical phenomena, has been brought under control, the government said on Wednesday, ______ no cause of it has been made public.
A. though B. when C. that D. because
解析:尽管没有病例公布
28. Space exploration has been made ______ with the development of modern science and technology.
A. it possible B. it was possible C. that possible D. possible
解析:该句测试是make sb./ sth.+adj. 结构,如果用A项,后应用to do sth.,因为it是形式宾语,代替不定式。
With the development of modern science and technology, man has made space exploration possible.
29. We want such materials ________ can bear high temperature and pressure.
A. that B. as C. what D. which
解析such materials as 引导的是定语从句,as 在从句中作主语;而such materials that 引导的是结果状语从句,that 在从句中不充当成分。
30. Hardly ___________the door when he rushed into the office out of breath.
A.I opened B. did I open C.I had opened D. had I opened
解析hardly 以及含有否定意义的副词放在句首,句子用倒装结构。
hardlywhen/ no soonerthan 用法相同。
31. You will see this product wherever you go.
A.to be advertised B.advertised C.advertise D.advertising
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