When _______ to our school, the new study methods are popular with all the students.
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A
to introduce
B
introduced
C
introducing
D
to be introduced
推荐题目
The professor explained this theory so clearly that this phenomenon was easy enough ________.
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A
for us to work out
B
working out
C
for working out
D
to working out
Our director is out. I'll have her ________ you on the matter when she's back.
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A
to contact
B
contacting
C
contact
D
contacted
.The day for the meeting ________, they all left the conference room.
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A
was fixed
B
fixing
C
fixed
D
being fixed
The scientist spent years alone in the forest，____ by eating wild fruit and small animals．
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A
surviving
B
survived
C
to survive
D
having survived