. The _______ boy was last seen _______ near the East Lake.
A. missing; playing B. missing; play C. missed; played D. missed; to play
Don’t leave the water_______ while you brush your teeth.
A. run B. running C. being run D. to run
The salesman scolded the girl caught ______ and let her off.
A. to have stolen B. to be stealing C. to steal D. stealing
11. Though I have often heard this song ______, I have never heard you ______ it.
A. being sung; sang B. sang; singing C. sung; sing D. to be sung; to sing
____________, they have been struggling against the snowstorm for ten hours.
A. Up to now B. By the time C. From then on D. In the future
Our teacher looked here and there on our playground ________ looking for something.
A. even though B. even if C. as if D. only if
