题目内容

His studies on the life and contributions of Isaac Newton to optics______versatile and impressive.

A. is
B. are
C. will be
D. be

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找规律填数字是一项很有趣的活动，特别锻炼观察和思考能力。下列选项中，填入数列“1、2、9、33、()”空缺处的数字，正确的是()。

A. 122
B. 124
C. 126
D. 128

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A. has worked
B. had worked
C. had been worked
D. used to work

幼儿认真完整的听完老师讲的故事，这一现象反映了幼儿注意的什么特征？()

A. 注意的选择性
B. 注意的广度
C. 注意的稳定性
D. 注意的分配

The astronauts on board the spaceship______ in shape by running around the ceiling of a huge circular room.

A. keeps
B. has kept
C. keep
D. was kept