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――Did you see Grace in the teacher’s office？

  ――Yes, she ______to him why she didn’t hand in her assignments

  A. is explaining     B. was explaining    C. had explained     D. explained

 My cousin and I were in the same school and she often came to my classroom to see if I had tough questions_______.

――Is there an direct flight to New York tonight?

   ――There______ be; I’ll ring the ticket office and find it out.

  A. can     B. will      C. might     D. need

I think I can help you repair your computer tomorrow. ________, you’ll have to will till this weekend.

  A. If so      B. If any       C. If not      D. If possible

 _______ such heavy loss twice, the businessman had a hard time and didn’t have the courage to continue.

A. Having suffered        B. Suffering       C. To suffer        D. Suffered

My daughter is not sure what to_______ at the university; she can’t make up her mind about his future.

A. take up              B. make up         C. pick up             D. build up

_____ I fully understand your point of view, I do also have some sympathy with Michael's.

  A. Because     B. While      C. As       D. If

---- Would you have gone shopping had it been possible?

   ---Yes, but I ___ busy doing my homework.       

  A. was   B. am   C. had been   D. were

In ____late 19^th century, Europe changed ______great deal and was playing important roles in ______international trade.

  A. the; a; the   B. the; the;不填   C. the; a; the    D. the; a; 不填

Tom is so stubborn and careful a man, that it took five hours to_______ him of my good idea and to give up his.

  A. ask       B. convince       C. remind      D. inform