This is a process happens when land becomes desert people cut down trees and dig up grass.
A.
when; because
B.
that; because of
C.
when; because of
D.
which; because
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参考答案:
举一反三
【单选题】Task 1 Read the text and decide whether the following statements are true (T) or false (F). The writer had been out of job for a long time before she went back to community college again.