Physics is difficult ____.
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A
to be learned
B
to learn
C
to be learning
D
to be learn
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There are hundreds of students in front of the school gate to welcome the scientist from America.
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A
waited
B
to wait
C
waiting
D
wait
While _________, people sometimes can’t help buying something they don’t really need.
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A
shopped
B
being shopped
C
to shop
D
shopping
Linda had her luggage________ an hour before her plane left.
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A
check
B
checking
C
to check
D
checked
The doctor did __________ save the patient’s life.
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A
that he could do
B
all what he could
C
all he could to
D
which he could