Bob speaks English very well. He practis

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问题选择题

Bob speaks English very well. He practise ________ English every day.[ ]

A. speaking

B. speak

C. speaks

D. to speak

答案

答案：A

选择题

造成海陆变迁的最主要原因是：（）

A．流水侵蚀

B．地壳变动和海平面升降

C．人类长期活动

D．风力的侵蚀

单项选择题

It can be inferred from the passage that Planck's work led to the development of which of the following

A．The rocket.

B．The atomic bomb.

C．The internal combustion engine.

D．The computer.