If you______careful with electricity, you might get a shock.

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问题 If you______careful with electricity, you might get a shock.

选项 A、don’t
B、wouldn’t
C、won’t
D、aren’t

答案D

解析 careful为形容词,在从句中作表语,其前面应该由系动词与其连用构成复合谓语。故选D。
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