Only after Helen moved to Australia ______ how important she was to me .
#81608
A
I had realized
B
had I realized
C
I did realize
D
did I realize
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_____, he cannot solve the word puzzle.
#84096
A
Hard although he tried
B
He tried hard although
C
However hard he tried
D
As he tried hard
—Why didn’t you say hello to him yesterday?—What a shame!But never before_______I_______him.
#84163
A
/;had met
B
have;met
C
did;meet
D
had;met
Not once________to Michael that he could one day become a top student in his class.(2013·湖南，35)
#79681
A
occurred it
B
it did occur
C
it occurred
D
did it occur
_________ you take an active part in physical activity ______ be able to keep fit and stay healthy.
#80778
A
Only if; you will
B
Only if; will you
C
Unless; you will
D
Unless; will you