The teachers are doing what they _____ t_爱下问搜题

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问题选择题

The teachers are doing what they _____ their students. [ ]

A. can to teach

B. can teach

C. can teaching

D. can to teaching

答案

答案：A

选择题

The Internet connection for the entire area _________ when there was a sudden power cut yesterday.[ ]

A. lost

B. was lost

C. had lost

D. had been lost

单项选择题

下列哪项是动脉粥样硬化的主要易患因素（）。

A.高血压

B.肥胖

C.饮酒

D.A型性格

E.遗传