Coal can be used to , so we used to with coal, but today we are used to with gas. [ ] A．cook; cook; cooking B．cooking; cook; cook C．cook; cooking; cooking D．cooking; cooking; cook 题目和参考答案——青夏教育精英家教网—

题目内容

Coal can be used to ________, so we used to ________ with coal, but today we are used to ________ with gas.

[　　]

A．cook; cook; cooking

B．cooking; cook; cook

C．cook; cooking; cooking

D．cooking; cooking; cook

答案：A
解析：

【巧解导析】句意为“煤可用来做饭，因此我们过去常常用煤做饭，但今天我们习惯用煤气做饭．”

提示：

【巧解点悟】第一空意为“被用来”；第二空意为“过去常常”；第三空意为“习惯于”．因此三个空所用结构分别为：be used to do，used to do和be used to doing．

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