单项选择题

________ they change the coach they will lose the match.

A．Until
B．Before
C．Unless
D．Although
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单项选择题
The children ________ many times not to go near the reservoir.
A．were being told
B．have been told
C．had been told
D．told
单项选择题
Please remember to keep in ________ with me through e-mail when you are abroad.
A．touch
B．trouble
C．promise
D．approval
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