搜题
王老师:19139051760(拨打)
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第1题

普通话:以北京语音为标准音，以北方方言为基础方言，以典范的现代白话文著作为语法规范的现代汉民族共同语 ()。
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第2题

The reason () grass is green was a mystery to the little boy.. A. why B.which C.that D.for
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第3题

We could do nothing but () till he came back. A. to wait B.wait C.waiting D.waited
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第4题

I () to the hospital yesterday but l forgot all about it.。 A. had to go B. should have gone C. ought to go D.should
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