Isn"t it time you got down to ________ the papers?A．markB．be markedC．being mark
题型：不详难度：来源：
Isn"t it time you got down to ________ the papers?| A．mark | B．be marked | | C．being marked | D．marking |
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答案
| D |
解析
| “got down to”中的“to”是介词，因而要用动名词作宾语，而动名词“marking”与其逻辑主语“you”是主动关系。 |
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