She usually sleeps (nine hours) a day对括号内提问（）（）does she usually _英语解答

She usually sleeps (nine hours) a day对括号内提问（）（）does she usually sleep a day

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解答

How long how long的用法how long有以下两个主要意思：1.表示多长时间,主要用来对一段时间(如three days,four weeks 等)提问.如：A：How long did he stay here?他在这儿呆了多久?B：About two weeks.大约两个星期.A...