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--Haven't you seen Mr. Wilson at the lecture?--Yes, but he had left _________ I could ask him any questions.
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A
when
B
before
C
after
D
as
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He’ll come back ____ a week.   
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A
from
B
at
C
after
D
in
Thank you ________ me with my English.
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A
for help
B
for helping
C
to help
D
helps
The accident happened _________ an autumn early morning.
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A
in
B
at
C
on
D
for
--- Which one is your mother?         --- The woman _______ glasses.
#46146
A
on
B
with
C
in
D
to
_________ the help of man-made satellites, we can know what the weather will be like in the next few days.
#50033
A
Under
B
With
C
Using
D
By