Dog tell the blind person when it is ---- to cross the road. A save B safe C safely D safety 为什么

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Dog tell the blind person when it is ---- to cross the road. A save B safe C safely D safety 为什么
Dog tell the blind person when it is ---- to cross the road. A save B safe C safely D safety 为什么

Dog tell the blind person when it is ---- to cross the road. A save B safe C safely D safety 为什么
B
it is safe to do sth 做某事安全
作表语用形容词

B.safe
用形容词,it is safe to...做某事安全

填safe
因为在be动词is后面要用形容词,只有safe对
翻译:狗能告诉盲人什么时候过马路安全。

B 只有B是形容词

B,safe做宾语,这里的when引导的时间状语的倒装形式,正过来说就是when to cross the road is safe