We        the manager , but no one        the telephone number .

A. could have called ; knew        B. could have called ; had known

C. could call ; had known          D. could call ; knew

 —What’s wrong with your coat ?

— Just now when I wanted to get off the bus , the man next to me        on it .

A. sat         B. had sat         C. had been sitting       D. was sitting

With more forests being destroyed , huge quantities of good earth        each year .

A. is washing away               B. is being washed away

C. are washing away              D. are being washed away

I have always been honest and straightforward , and it doesn’t matter        I’m talking to .

A. who is it    B. who it is        C. it is who             D.  it is whom

 The house rent is expensive , I’ve got about half the space I had at home and I’m paying       

here .

A. as three times much             B. as much three times

C. much as three times             D. three times as much

 I’m sure that your letter will get        attention . They know you’re waiting for the reply .

A. continued        B. immediate         C. careful          D. general

We        last night , but we went to the concert instead .

A. must have studied              B. should have studied

C. could have studied              D. studied

      you may have , you should gather your courage to face the challenge .

A. However a serious problem       B. Whatever a serious problem

C. However serious a problem       D. No matter how a serious problem

When changing lanes , a driver should use his turning signal to let other drivers know        .

A. he is entering what lane          B. which lane he is entering

C. he is entering which lane         D. which lane is he entering

—When shall we restart our business ?

—Not until we        our plan .

A. will finish     B. are finishing     C. are to finish      D. have finished