— How could they keep us waiting for so long? — They got on the bus half an hour ago and they ________ be here in ten minutes, I think.
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A
might
B
would
C
should
D
must
推荐题目
Had your father seen the doctor earlier, he ____.
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A
would have died
B
would not have died
C
would not die
D
has not died
. --- Did you often e-mail your family during the first year at university? --- No. I was so busy meeting new people that I didn’t write to my family as I _____.
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A
ought to
B
should do
C
should have written
D
should have