问题
选择题
How can you expect him to make any improvement____ you never give him a chance to have a try?
A．unless
B．when
C．until
D．even if
答案
答案：B
考查连词。此处when意为既然。句意为既然你不给他尝试的机会，你怎么能期望他提高呢。
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