—Coach, can I continue with the training?
—Sorry, you can't ______ you haven't recovered from the knee injury.
A、
until
B、
before
C、
to consider
D、
unless
【正确答案】
C
【答案解析】
此题考查原因状语从句。“教练，我能够继续我的训练吗?”“不行，因为你膝盖的伤还没有痊愈。”后句是现在完成时，要选A或者B，后句要变成肯定句，并使用一般现在时。 “Sorry, you can't before you recover from the knee injury.”
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