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1. _____ he comes tomorrow, I shall ask him where he has been.
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3. _____ they picked tea, the girls song happily.
4. Have a good look at that man _____ you pass him.
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A.when / When B. while / While C. as / As
1. _____ he comes tomorrow, I shall ask him where he has been.
2. _____ he was speaking, everybody listened carefully.
3. _____ they picked tea, the girls song happily.
4. Have a good look at that man _____ you pass him.

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