Is our playground still over there？
No， a large library ________ on it two years ago．（ ）
A．is builtB．was builtC．has built
Our teacher was very happy because failed the exam．（ ）
A．somebodyB．anybodyC．nobody
﹣ Could you the computer for me， dear？ I want to check my e﹣mails．
﹣ Certainly．（ ）
A．turn onB．turn downC．turn off
﹣ I'm going on a vacation this weekend．
﹣ ．（ ）
A．The same to youB．Have a good time
C．Hurry up
Be careful，________ you'll make fewer mistakes in the exam．（ ）
A．orB．butC．and
Don't worry． We're old enough to look after ．（ ）
A．weB．usC．ourselves