A.Because
B.Since
C.For
D.While
第1题
A.the highest
B.the highest of that
C.the highest of which
D.the highest of them
第2题
A.must be dropping
B.must have dropped
C.must have been dropped
D.must drop
第3题
A.more than to go
B.more than going
C.than going
D.rather than to go
第4题
A.learning history
B.history
C.study of history
D.history learning
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