Computers ____ in offices and homes since 1970s. 
A．have been usedB．had been usedC．was usedD．has been used
A

試題分析:考查動詞時態(tài)語態(tài)。根據(jù)since the1970s可以判斷句子用現(xiàn)在完成時，再根據(jù)主謂一致的原則可知A選項正確。句意：自從二十世紀七十年代以來，電腦被應用于了家庭和辦公室。
練習冊系列答案
相關(guān)習題

科目：高中英語 來源：不詳 題型：單選題

If it ______ too much trouble, I’d love a cup of coffee.
A．isn’tB．wasn’tC．weren’tD．hadn’t been

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

This is my workmate ,Mr. zhou , but he ________ in New York for 10 years.
A．has workedB．workedC．is workingD．had worked

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

. -Did you get ro the village before the sun set?
-No. It was already midnight. My bike ____ on the way.
A．has brokenB．was breakingC．breaksD．broke

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Experiments of this kind ___in both the U．S and Europe well before the Second World War．
A．had conductedB．have conducted
C．have been conductedD． had been conducted

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

At this time next year______ our holiday in Beijing..
A．we’re havingB．we’ll be having
C．we’ll haveD．we’re to have

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.
A．will changeB．has changed
C．will have changedD．is changing

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

That is the first time that I _____ at the meet­ing.
A．had spokenB．have spoken C．a(chǎn)m presentD．was present

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

All possible means ____ to prevent the air pollution, but the sky is still not clear.
A．is usedB．has been usedC．a(chǎn)re useD．have been used

查看答案和解析>>

同步練習冊答案