单选题：Corn originated in the New World and thus was not known in E

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  • 题目类型：单选题
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题目内容：
Corn originated in the New World and thus was not known in Europe until Columbus found it （　　）in Cuba． A．being cultivated
B．been cultivated
C．having cultivated
D．cultivating

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They are going to have the serviceman（　　） an electric fan in

They are going to have the serviceman（　　） an electric fan in the office tomorrow

分类：公共英语四级  题型：单选题
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Mark often attempts to escape（　　） whenever he breaks traffic

Mark often attempts to escape（　　） whenever he breaks traffic regulations.A．havin

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The boy's father bought him a large toy train （　　）.

The boy's father bought him a large toy train （　　）.A．which to play with B．to pla

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In this experiment, they are wakened several times during th

In this experiment, they are wakened several times during the night and asked to

分类：公共英语四级  题型：单选题
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