________ I cannot understand is ________ she wants to resign her present job.

  A．What; why         B．Which; how         C．That; why          D．What; which

 _______ most children nowadays are the only children, they tend to be more self-centered.

  A．Ever since           B．Now that             C．Only if                D．Even though

 The middle-aged man said he would accept the job, so we have asked him to ________ his acceptance in writing.

       A．confirm               B．convey                C．convince             D．consider

 __________ the clouds, you would find the airplane in the sky easily

       A．Had it not been for                             B．If it were not  

       C．If it had not been for                          D．Were it not for

 My toothache is killing me．I _____ it _____ away．But now it’s getting worse and worse.

     A．think; is going                          B．thought; was going       

  C．have thought; is going                   D．had thought; had gone

 —Jack, this is the third time that you have been late this week.

—Sorry, sir, but I was_____ for 15 minutes on the way here in the traffic jam.

  A．held up             B．put up             C．taken up            D．given up

 —______ I lock the lab before I go home?

—Don’t bother．I’ll check it myself later.

  A．May                B．Must                   C．Can                    D．Shall

 —I got an email from Susan, _  __ said she was going abroad for sightseeing.

—Fantastic! That’s what she has been dreaming of.

       A．which                 B．she                  C．who                    D．it 

 I’m not sure whether I will have anything else to do this evening．_____, I will try every possible means to come to your birthday party.

       A．Even though       B．If so                C．Anyhow            D．Instead

 We needed a new cupboard for the kitchen．So Peter made _____ from some wood we had.

      A．it                    B．one                 C．himself             D．another