问题描述：
elections _______ every four years and congress meets once a year.
25.Elections _______ every four years and Congress meets once a year.
a. are taken place b. are to be taken place c. took place d. take place
不是要用被动的吗,为什么要选D呢?
25.Elections _______ every four years and Congress meets once a year.
a. are taken place b. are to be taken place c. took place d. take place
不是要用被动的吗,为什么要选D呢?
问题解答：
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