题目内容
We’ll have a picnic in the Summer Palace this Sunday ________it rains or it’s very cold.
A.since | B.if | C.until | D.unless |
D
解析
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题目内容
We’ll have a picnic in the Summer Palace this Sunday ________it rains or it’s very cold.
A.since | B.if | C.until | D.unless |
D
解析