They watch TV__________. A．one a weekB．once a weekC．one the weekD．once week

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They watch TV__________.

A．one a week

B．once a week

C．one the week

D．once week

答案

解析

试题分析：表示频率的短语的结构是“次数+时间段”，once“一次”，a week“一周”，故只有B符合要求，本句的意思是“他们看电视每周一次。”所以本题选B。
点评：本题实际上考查频率词的构成“次数+时间段”。应注意一种情况：只有次数，并不表示频率。提问频率用how often，而提问次数用how many times。

举一反三

There are __________ flowers in the square during National Day.

A．million of

B．millions of

C．two millions

D．two millions of

题型：不详难度：| 查看答案

Several ________ students came to the meeting.

A．thousand

B．thousands

C．thousand of

D．thousands of

题型：不详难度：| 查看答案

Elvis Presley has sold more than one______ records all his life.

A．billion

B．billion of

C．billions of

D．billions

题型：不详难度：| 查看答案

December is the ______ month in a year.

A．twenty

B．twelve

C．twentieth

D．twelfth

题型：不详难度：| 查看答案

people come to visit the Great Wall every year.

A．Million of

B．Millions of

C．Million

D．Millions

题型：不详难度：| 查看答案