The teachers are doing what they _____ their stuaits.A.can to teach B.can teach C.can teaching

问题描述:

The teachers are doing what they _____ their stuaits.A.can to teach B.can teach C.can teaching
The teachers are doing what they _____ their stuaits.
A.can to teach B.can teach C.can teaching D.can to teaching
which and why?

B
老师们尽他们所能老教学生.
what they can + 动词不定式 表目的虽然我也认为是B,但参考答案是A. can to teach 难道是特殊用法?sorry. 答案应该是: A我上面的解释已经说清楚了。我也看明了, 这里的不定式是针对全句的,而不是can