填空题

We waited and waited, and finally ______(我们等的公共汽车来了).

【参考答案】

came the bus we had been waiting for

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单项选择题

62（）

A. unique
B. sheer
C. early
D. timely

单项选择题

What is one of the options to avoid the extinction of some species in spite of its high cost（）

A. To set domestic animals free to move.
B. To lay down some protective policies.
C. To move species to suitable climate zones.
D. To protect the surrounding environment.