题目内容

【C4】

A. ends
B. extremes
C. spots
D. sides

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It has been estimated that the earth's surface temperature has increased______ one quarter

A. by
B. at
C. to
D. with

【C3】

A. reasons
B. examples
C. facts
D. truths

“出口日期”栏：()。

A. 2007.10.04
B. 2007.10.14
C. 2007.10.15
D. 2007.10.05

【C10】

A. Unless
B. If
C. Lest
D. Before