On the surface of the water________, which spoiled the beautiful scenery of the park.
#81945
A
some dead leaves did float
B
did float some dead leaves
C
floated some dead leaves
D
did some dead leaves float
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Never before _____seen anybody who can play tennis as well as Robert.
#81742
A
had she
B
she had
C
has she
D
she has
Only when I got here _________ that I had made a big mistake.
#82970
A
did I realize
B
I realized
C
I have realized
D
have I realized
Not until ________ her dark glasses ___________ she was a famous film star.
#84601
A
did she take off, I realized
B
she took off, did I realize
C
did she take off, did I realize
D
she took off, I realized
Only in this way ____to make an improvement in the operating system.
#79589
A
you can hope
B
you did hope
C
can you hope
D
did you hope