单项选择题

— May I go and play football with Dick this afternoon, Dad
— No, you can't go out ______ your work is being done.

A. before
B. until
C. as
D. after
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单项选择题
______ a difficult situation，SO you should send him a message and give him some advice．
A．As he is in
B．He is in
C．Being in
D．He being in
单项选择题
______ the man grew older, he lost interest in everything except gardening.
A. With
B. Since
C. While
D. As
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