问题

Research shows that teenagers ________ talk abouttheir day with family members at the dinner table are less likely to engage inhigh-risk behavior.

A:what
B:who
C:whom
D:\

正确答案是：

同类题型

Global warming ________ cause huge climatic changes and possibly a new ice age.

I bought lots of English test papers _______________ my brother’s advice.

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must apologise ________ you so late.

How are you going to be a computer programmer—I’m going to _______.