还有一种Cogent as this response is, it has some minor errors. Somewhat reasonable as the issue presents, it does not experience a case-by- case examination. 还有比较常用的a...
句型28:have nothing to do They have nothing to do every day. 他们每天无所事事。 句型29:be sure/ be sure of / about sth / be sure to do sb I think so, but I'm not sure. 我想是这样,但不敢确定。 I was not sure of / about the way, so I asked someone...
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