The robot needs _______ once a month. And we will check it for you for free.A.to checkB.checkedC.che

题目简介

The robot needs _______ once a month. And we will check it for you for free.A.to checkB.checkedC.che

题目详情

The robot needs _______ once a month. And we will check it for you for free.
A.to checkB.checkedC.checkingD.to checking
题型:单选题难度:中档来源:不详

答案

A

试题分析:句意:那个机器人每个月需要被检查一次。而且我们将为你免费检查它。need doing="need" to be done需要被……。故选A。

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