Ecologists today warn that we face a twofold menace. The everpresent possibility of volcanic erup
PART ONE Ⅰ.Vocabulary and Structure (10 points, 1 point for each item) 从下列各句四个选项中选出一个最佳答案,并在答
参考答案 Ⅰ. Vocabulary and Structure (10 points, 1 point for each item ) 1.C 2.B 3.B 4.A 5.C 6.D 7.
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