Although the causes of cancer_____, we do not yet have any practical way to prev - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

Although the causes of cancer_____, we do not yet have any practical way to prevent it.

A．are being uncovered

B．have been uncovering

C．are uncovering

D．have uncovered

答案

解析

因为句子的主语the causes of cancer与谓语uncover 是被动关系，因此我们使用被动结构，只有A 符合这一条件。

核心考点

试题【Although the causes of cancer_____, we do not yet have any practical way to prev】；主要考察你对一般现在时等知识点的理解。[详细]

举一反三

—I’ve got to go now.
—Must you ?I ______you could stay for dinner with us.

A．think	B．thought
C．have thought	D．am thinking

题型：不详难度：| 查看答案

——— Ring me at six tomorrow morning， will you?
——— Why that early? I ______ .

A．will be sleeping

B．have slept

C．have been sleeping

D．will sleep

题型：不详难度：| 查看答案

—He _______ to the meeting. Have you informed him of it?
—Sorry. I ________to.

A．hasn’t come; am going

B．didn’t come; have forgotten

C．hasn’t come; forgot

D．doesn’t come; will have

题型：不详难度：| 查看答案

Jane was disappointed that most of the guests ______when she _______ at the party.

A．left; had arrived	B．left; arrived
C．had left; had arrived	D．had left; arrived

题型：不详难度：| 查看答案

They ______ on the program for almost one week before I joined them, and now we _____on it as no good results have come out so far.

A．had been working; are still working	B．had worked; were still working
C．have been working; have worked	D．have worked; are still working

题型：不详难度：| 查看答案

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