Thedetectivewatchedaladyoften_____

发布时间：2020-07-26 19:51:47

The detective watched a lady often ________ in the supermarket on Monday mornings．A.appearB.to appearC.appearedD.appears

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A解析有些动词例如：see, make, hear, feel, notice, watch后接不定式作宾语补足语，to要省略．
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