单项选择题

According to the passage, primitive ocean life begins to evolve into complex organisms （）

A．in the middle of December
B．when Earth is cratered
C．at the beginning of November
D．when the land is still a lifeless waste

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热门试题

单项选择题

In the one-year-long film dinosaurs （）

A．die out on December 25
B．appear after December 25
C．die out on December 24
D．appear on December 24

单项选择题

Before 1914 female secretaries were rare because they （）

A．were less efficient and less trained than men
B．were looked down upon by men
C．would have disturbed the other office workers
D．wore stockings and were not as serious as men