公共英语一级

单选题I began to learn English __________l was five．

A．when
B．since
C．if

参考答案：A进入在线模考
句意：我五岁时开始学习英语。本题考查连词的用法。when和since都可以引导时间状语从句，但所运用的时态不同，since自从，常用于现在完成时；when当…的时候，而此处主句用的是一般过去时，所以用when。故A项正确。
【知识拓展】since引起时间状语的四种用法：l．since+过去一个时间点，如具体的年、月、日、钟点等。如：I have been here since l989．自1989年以来我就在这儿。2．since+一段时问+a90。如：I have been here since five months a90．我在这儿五个月了。3．since+从句。如：Great changes have taken place since you left．自你走后，发生了很大变化。4．It is+一段时问+since从句。如：It is two years since I became a post graduate student．我成为研究生已经两年了。

你可能感兴趣的试题

1Jane hasn’t 7 t finished her homework and I haven’t finished mine，__________．

A．either
B．neither
C．too

点击查看答案进入在线模考
2Neither my dog __________my cat Can be seen in the house．What’s the matter?

A．and
B．or
C．nor

点击查看答案进入在线模考
3Mr. Boffin drove there and __________his car outside the station．

A．parked
B．carded
C．set

点击查看答案进入在线模考

最新试题

情景：你要去美国，想请你的朋友Jack帮你找一处住所。 任务： 请你用英语给他写一个50个词左右的电子邮件。内容包括

类型：简答题2018-03-20

She has taught in the school since 20 years ago． She has ta

类型：简答题2018-03-20

She has twenty American students in her class． There ______

类型：简答题2018-03-20

Miss Li teaches foreign students Chinese in a language schoo

类型：简答题2018-03-20

What can robots do in future homes?

类型：单选题2018-03-20

After working for a long time，robots __________．

类型：单选题2018-03-20

What difficult job can robots do for us?

类型：单选题2018-03-20

What are the eyes of some robots?

类型：单选题2018-03-20

请根据下面短文回答第题： Robots(机器人)have been with US for quite some ti

类型：单选题2018-03-20

What will the mother bear do when the babies do not listen t

类型：单选题2018-03-20