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1£®Nothing he had done turned out to be useful, _______________?

A£®did it                                                         B£®had he

C£®hadn’t he                                                  D£®didn’t it

2£®—I spend two weeks in Beijing last year.

—Then you must have visited the Great Wall during your stay, ________ you?

A£®mustn’t                                                     B£®didn’t

C£®haven’t                                                     D£®hadn’t

3£®There is little doubt in your mind that he is innocent, _______?

A£®is there                   B£®isn’t there               C£®is he                      D£®isn’t he

4£®Mrs. Green doesn’t believe that her son is able to design automobiles, ?

A£®is she                     B£®isn’t she                 C£®doesn’t she             D£®does she