Most computer users think it necessary for their software regularly．A．to up dateB．to be updatedC．to have been up datedD．to have updated 题目和参考答案——青夏教育精英家教网—

题目内容

Most computer users think it necessary for their software ________ regularly．

A．to up date	B．to be updated
C．to have been up dated	D．to have updated

试题分析：句意：大多数电脑使用者认为按时更新他们的软件是很必要的。这里it是形式宾语，不定式是真正的宾语，“他们的软件”和“更新”之间是被动关系，故用被动语态；且表示经常或反复发生的动作，故用不定式的一般式，选B。

练习册系列答案

_________ himself with confidence, the young man went to the manager’s office bravely.

Everyone is looking forward to seeing the plan ________ in the near future.

______to the sun for too long, I think, can hurt your skin.

The foreign friends you referred to ______ looking forward to ______ around our school.

A．are; being shown	B．being；being shown
C．being; showing	D．are; be shown

When first ______ to the market, these new products in their company enjoyed a great success.

The chair looks rather hard, but in fact it is very comfortable to _______.

You can use a large plastic bottle, cut off, as a pot to grow flowers in.

试题分类