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Having taken our seats,_______________________.
#96737
A
the professor began the lecture
B
the lecture began soon
C
we were attracted by the lecture soon
D
the bell announced the beginning of the lecture
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Can you imagine what difficulty he had ____ the work?
#89953
A
to do
B
do
C
doing
D
done
—What are you mailing, Tom? — A textbook      a new method of teaching physics. I want my friends to take a look at it.
#90174
A
is based on
B
based on
C
basing upon
D
which based upon
A middle-aged woman came _____ to the bus stop only _____ the bus had gone.
#92945
A
to run; to find
B
running; to find
C
and ran; finding
D
running; finding
In April, 2009, President Hu inspected the warships in Qingdao,    the 60th anniversary of the founding of the PLA Navy. 
#98974
A
marking
B
marked
C
having marked
D
being marked
Three suspects ________ in the terrorist attack in Kunming have been caught.
#88846
A
involved
B
to involve
C
being involved
D
involving