If you really have to leave during class, you’d better leave____ the back door.
A. for B. at C. by D. out
----Do you think it wise for Chinese mothers to try to do everything for their children?
----No, that’s they are mistaken.
A．what B．when C．where D．how
Everyone must ___ their notebooks on the desk while taking an English exam.
A. put away B. put down C. put off D. put up
He is rather difficult to make friends with, but the friendship of his, _____, is truer than that of anybody else’s.
A. while gained B. when to gain C. after gaining D. once gained
The wrong you’ve done to her is terrible, ____ you should make an apology to her, I think.
A. for which B. about which C. of which D. with which
---I saw Mr. Smith at Xianyang Airport this morning.
---You ____. He’s still on holiday in Hawaii.
A. can’t B. couldn’t have C. mustn’t have D. needn’t
