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—Let’s go for a picnic next Sunday. —Sorry, I can’t. I have to look ____________my pet parrot.
#47850
A
after
B
at
C
for
D
like
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The police warned us ______ possible danger.
#50023
A
for
B
in
C
to
D
about
John arrived _____ London _____ a cold morning.
#50403
A
on; at
B
at; at
C
in; on
D
at; in
Only four days remained ____ the exam.    
#50123
A
at
B
after
C
before
D
since
I am so tired today. I swam _____ the river in the morning and I walked ____ the forest in the afternoon.
#49666
A
through, through
B
across, across
C
across, through
D
through, across
—We’ll go to Zhejiang University tomorrow. Where shall we meet?            —Please wait _____ the bus stop near the book shop.                  
#46064
A
for
B
in
C
at
D
on