题目内容

Humpback whales () swim close to land.

A. often
B. arely

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When a whale breaches, it () the water.

A. jumps out of
B. dives deep into

Humpbacks work together to ().

A. catch fish
B. attack boats

Humpback whales talk to each other by ().

A. singing
B. moving their flippers

绘制Rubric表格确定评价等级的数量最好是（）。

A. 1~2个
B. 3~5个
C. 4~6个
D. 6个以上