She didn't know___ back soon.
A. whether he would be
B. if would he be
C. he will be
D. he would be
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I don't know _____ he still lives here after so many years.
A. whether
B. where
C. what
D. when
Do you know _____ they listened to yesterday evening?
A. what
B. when
C. why
D. how
They don't know ______their parents are.
A. that
B. what
C. why
D. which
Please tell me ______what last year.
A. where does your sister work
B. where did your sister work
C. where your sister works
D. where your sister worked
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