If we ________ careful, fire can be dangerous.A．don’t beB．areC．won’t beD．aren’t
题型：不详难度：来源：
If we ________ careful, fire can be dangerous.| A．don’t be | B．are | C．won’t be | D．aren’t |
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答案
| D |
解析
| 如果我们不小心，火会很危险。从句意来看前面应是否定意思。主句用may/might/can 时，if从句用一般现在时。所以选D。 |
举一反三
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