单项选择题

We’ll visit Europe next year ______ we have enough money.

A. lest
B. until

C. unless
D. provided
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单项选择题
The course normally attracts 20 students per year, ______ up to half will be from overseas.
A. in which


B. for whom
C. with which


D. of whom
单项选择题
In this experiment, they were wakened several times during the night and asked to report what they ______.
A. had just been dreaming

B. have just been dreaming
C. are just dreaming

D. had just dreamed
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