Adults sometimes envy children who play all the time ______ they themselves have to work, rain or shine.

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问题 Adults sometimes envy children who play all the time ______ they themselves have to work, rain or shine.

选项 A、while
B、once
C、since
D、though

答案A

解析 本题考查连词的用法。while当……同时,once一旦,since自从……,though虽然,即使。
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本试题收录于: 英语题库成考专升本分类
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