A.on
B.in
C.at
D.during
第1题
A.go in for
B.keep up with
C.follow up
D.pass on
第2题
A.generously
B.lonely
C.fatally
D.slightly
第3题
A.went up
B.went clown
C.went after
D.went over
第4题
A.keep an eye on
B.set foot on
C.make a guess at
D.look forward to
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