题目内容
I had travelled only two hours one day ______ the winds increased so much that I had to put my
tent up _______ the winds became too strong.
tent up _______ the winds became too strong.
[ ]
A. when , before
B. when , after
C. when, until
D. until , before
B. when , after
C. when, until
D. until , before
A
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