These young trees must .A．look after wellB．be well looked after C．take go
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These young trees must .| A．look after well | B．be well looked after | | C．take good care of | D．be taken good care |
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答案
| B |
解析
| 考查被动语态。被动语态的构成是am/is/are+过去分词。These young trees是物作主语，应该用被动语态；must后应该用动词原形，am/is/are的原形是be，排除A、C；D项的固定短语缺少介词of，排除D。“照顾”look after=" take" care of。故选B。 |
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