问题
I saw David in the teachers’ office this morning. Do you know _________ he was there—He went there to hand in his homework.
A:how
B:whether
C:when
D:why;
B:whether
C:when
D:why;
正确答案是：
同类题型
He was _____ down for some days after he heard that he didn’t pass the exam.
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_____ do you go to see a film — Sometimes.
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