题目内容
There are some boys ________ in the river.
A.swimming | B.to swim | C.are swimming | D.is swimming |
A
A 考查固定句型。There be +名词 +doing sth.“有一些......正在做某事。”故选A。
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题目内容
A.swimming | B.to swim | C.are swimming | D.is swimming |