题目
题型:不详难度:来源:
A.have been used | B.had been used | C.was used | D.has been used |
答案
解析
试题分析:考查动词时态语态。根据since the1970s可以判断句子用现在完成时,再根据主谓一致的原则可知A选项正确。句意:自从二十世纪七十年代以来,电脑被应用于了家庭和办公室。
核心考点
试题【Computers ____ in offices and homes since 1970s. A.have been usedB.had been used】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
A.will graduate | B.will have graduated |
C.graduates | D.is to graduate |
A.is playing | B.plays | C.was playing | D.played |
A.has been declining; will be | B.has declined; would be |
C.had been in decline; would take | D.was on the decline; will take |
—Oh, I thought you might need it so I brought it here for you.
A.does it come | B.has it come | C.had it come | D.will it come |
A.had conducted | B.have conducted |
C.have been conducted | D. had been conducted |
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