My parents have promised to come to see me before I ______ for Africa.A．have lef - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

My parents have promised to come to see me before I ______ for Africa.

A．have left

B．leave

C．left

D．will leave

答案

解析

试题分析：句意,我父母已经答应在我去非洲之前来看我。before引导的时间状语从句，表示主句的动作发生在从句的动作之前。主句用现在完成时态，从句只能用一般现在时表示将来意义，故选B。
点评：before引导的时间状语从句，表示主句的动作发生在从句的动作之前。主句用现在完成时态，从句只能用一般现在时表示将来意义。

核心考点

试题【My parents have promised to come to see me before I ______ for Africa.A．have lef】；主要考察你对句法等知识点的理解。[详细]

举一反三

.If their marketing plans succeed, they ____ their sales by 30 percent.

A．will increase

B．have been increasing

C．have increased

D．would be increasing

题型：不详难度：| 查看答案

Come and see me whenever ____ .

A． you are convenient	B．you will be convenient
C． it will be convenient for you	D．it is convenient to you

题型：不详难度：| 查看答案

It was already lunchtime, so we sat down there was a nice garden and ate something.

A．before

B．unless

C．that

D．where

题型：不详难度：| 查看答案

At last, they reached _______ there was no grass and trees.

A．to the place where

B．where

C．the place which

D．in which

题型：不详难度：| 查看答案

_____ you may have, you should gather your courage to face the challenge.

A．However serious a problem.	B．What a serious problem.
C．However a serious problem.	D．What serious a problem.

题型：不详难度：| 查看答案

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