_______for the bus at the stop, he suddenly caught sight of a thief.
A. Waiting
B. When he was waiting
C. As he was waiting
D. all the above
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The soldier fell asleep ________.
A. with the candle burning
B. burning the candle
C. when he was burning the candle
D. when burning the candle
________, the Tiananmen Square looks more beautiful.
A. Being on
B. When being on
C. With all the lights on
D. When it turns on all the lights
____ the notice, he had an idea.
A. When he was watching
B. Watching
C. When watching
D. all the above
______ the notice, an idea came to his mind.
A. When he was watching
B. Watching
C. When watching
D. all the above
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