高中一道英语语法题,亲们帮我解释下~If _to speak,he has no problem expressing himself.A.asked B.asking C.ask D.to be asked选什么呢?If从句的主语怎么没有,是省略了吗?

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高中一道英语语法题,亲们帮我解释下~If _to speak,he has no problem expressing himself.A.asked B.asking C.ask D.to be asked选什么呢?If从句的主语怎么没有,是省略了吗?

高中一道英语语法题,亲们帮我解释下~If _to speak,he has no problem expressing himself.A.asked B.asking C.ask D.to be asked选什么呢?If从句的主语怎么没有,是省略了吗?
高中一道英语语法题,亲们帮我解释下~
If _to speak,he has no problem expressing himself.
A.asked B.asking C.ask D.to be asked
选什么呢?If从句的主语怎么没有,是省略了吗?

高中一道英语语法题,亲们帮我解释下~If _to speak,he has no problem expressing himself.A.asked B.asking C.ask D.to be asked选什么呢?If从句的主语怎么没有,是省略了吗?
选A
if (he is) asked to speak
省略了