_______ entering the classroom, remember to take your seat and turn off your cel

_______ entering the classroom, remember to take your seat and turn off your cel

题型:不详难度:来源:
_______ entering the classroom, remember to take your seat and turn off your cell phone.
A.AtB.FromC.UponD.As

答案
C
解析
本题考查介词辨析。介词 on/upon后跟 V-ing 形式作“在……时;一……就……”讲,相当于 as soon as 引导的状语从句。
举一反三
This year my brother made a little progress in his study, but _____, it’s been an unlucky year for him.
A.first of allB.all in allC.in allD.as a consequence

题型:不详难度:| 查看答案
The winner of the Grand Slams said that he had owed his success to many people, his parents_________.
A.after allB.by chance
C.on purposeD.in particular

题型:不详难度:| 查看答案
The government has made many laws ______ the people’s interests.
A.in favor ofB.in celebration of
C.in charge ofD.in front of

题型:不详难度:| 查看答案
If you let pressure benefit ________upset you,much more can be accomplished than you thought possible.
A.more thanB.rather thanC.other thanD.less than

题型:不详难度:| 查看答案
People try to avoid public transportation delays by using their own cars, and this ______ creates further problems.
A.in returnB.in case C.in addition D.in turn

题型:不详难度:| 查看答案
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