问题

Not until actually ________ with water shortage ________ appreciate the value of water to a region.
A:facing; one can
B:faced; can one
C:faced; one cannot
D:facing; cannot one
B:faced; can one
C:faced; one cannot
D:facing; cannot one
正确答案是:
同类题型
Mum told me not to drive____ high spead on the busystreet.
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Your coffee smells ______. — It’s from the USA. Would you like ______