单项选择题

Passage Two

A. Tall enough for them to build nests.
B. Short so that birds can find.
C. It doesn’t matter since all birds like both.
D. It depends on the kind of bird.
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单项选择题
A. The scientists know it is definitely getting smaller.B. The scientists know it is near extinct.C. The scientists still do not know.D. The scientists think it is rebounding slightly.
A. The scientists know it is definitely getting smaller.
B. The scientists know it is near extinct.
C. The scientists still do not know.
D. The scientists think it is rebounding slightly.
填空题
essential
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