8.We saw ____ audience clapping their hands when ______ popular singer appeared on the stage.( )
A. | the; the | B. | the; 不填 | C. | an; a | D. | 不填; the |
7.Don't have the water ______ while you brush your teeth.( )
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A. | running | B. | run | C. | to run | D. | ran |