选D
这是if引导的虚拟语气，主语为I时系动词为were，主句变为过去时
- Swimming in the river for teenagers is very dangerous.
2个回答
相关问题
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————（swim）in the river is dangerous.
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It is very___to swim in that river.（danger) The girl is ___w
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It is dangerous for little children to swim in the river.为什么
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The water in this river is _____ (danger) for us.
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Is the river d__ enough for swimming in?
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Is ____ dangerous to swim in the river alone? A．it B．this C．
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and,I,in the river,think,swimming,is ,intheresting ,very,too
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To swim in this river is very interesting
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Swimming in the river is excing
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Swimming in the river is exciting.