---John, my computer doesn’t workWhy not ask Mr. Liu it?A. checking B. to check C.

发布时间：2020-08-21 07:28:51

---John, my puter doesn’t work.   --- Why not ask Mr. Liu      it?
A. checking               B. to check                   C. to buy

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解析：ask sb to do sth 为固定词组用法，再根据意思，故选B
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