In 1492, Columbus_______ on one of the Bahama Islands, but he mistook it for an

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In 1492, Columbus_______ on one of the Bahama Islands, but he mistook it for an island of India.
　　A lands B landed C has landed D had landed

答案

解析

本题考察时态。动作前已经给出具体的过去时间in 1492，所以排除A和C。另外根据题目没有明确说明"登陆"是发生在"误解"之前的动作，排除D；选B

举一反三

It is the most instructive lecture that ________since I came to this school.
　　A attended B had attended C am attending D have attended

题型：不详难度：| 查看答案

In the near future more advances in the robot technology ______ by scientists.
　　A are making B in made C will make D will be make

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I"ll go to the library as soon as I finish what I

A．was doing	B．am doing
C．have done	D．had been doing

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By the time Jack r

eturned home from England, his son. from college.

A．graduated	B．has graduated
C．had been	D．had graduated

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Last month, the Japanese government expressed their thanks for the air they_______ from China.

A．receive

B．are receiving

C．have received

D．had received

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