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Young trees must___.A.looked after well B.be l

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Young trees must___.A.looked after well B.be l
Young trees must___.
A.looked after well B.be looked after well C.be taken good care D.taken good
还要说一下为什么.
Young trees must___.A.looked after well B.be l
应该选C 首先这是一个被动句所以排除A和D B选项after后面需要加名词所以B不对 所以选C
再问: 谢谢。
再问: 还有一个
再问: Tony___the English text. A. filed to pass B. failed passing C.failed to passing D.failed to
再答: A