many times, but he still doesn’t know how to operate the machine properly.A．Although I have shown himB．I have shown himC．Having been shownD．Having shown 题目和参考答案——青夏教育精英家教网—

题目内容

_____ many times, but he still doesn’t know how to operate the machine properly.

A．Although I have shown him	B．I have shown him
C．Having been shown	D．Having shown

考查句子结构。因为句子中有but,所以前面也应该是一个句子。答案为A。如果本题没有but,答案就应该是C。句意：我已经给他展示过很多次了，但是他仍然不知道怎么样恰当地操作机器。

练习册系列答案

The cat is the only one of her pets ___ she will have ____ on her bed.

Every time_____they met, they would talk several hours together about all of the situations_____ appear in the working world.

The country life we ______. The differences between rural and urban areas are disappearing.

A．were used to have changed	B．used to change
C．used to changing	D．were used to has changed

The village has developed a lot ________ we learned farming two years ago.

Eugene's never willing to change any of his opinions. It’s no use _____ with him.

—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that．

The possibility _________ we won’t produce enough goods troubles everyone here.

试题分类