You can’t imagine what difficulty we had _________ home in the snowstorm.
A. walked B. walk C. to walk D. walking
. 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
