20.Cathy,_____ the alarm clock for 6o'clock,or you would be late for the flight.( )
A. | setting | B. | sets | C. | set | D. | to set |
16.In China,______ number of people are studying English,and ______ number is growing year by year.( )
A. | the; the | B. | a; a | C. | the; a | D. | a; the |
13.It is ____ great pity that the discovery of flight MH 370still proves to be ____ failure.( )
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A. | 不填;a | B. | the; the | C. | a; a | D. | a;不填 |