By the time he was ten,Edison______experiments in chemistry.A．had already done　　

试题库

By the time he was ten,Edison______experiments in chemistry.A．had already done　　

题型：不详难度：来源：
By the time he was ten,Edison______experiments in chemistry.
A．had already done　　　　B．already had done
C．was already doing　　　　D．already did

答案
Ａ
解析
by+过去时间，谓语用过去完成时态。
举一反三
She told me that her father______to the post office when I arrived.
A．just went　　　　B．has just gone
C．had just gone　　　　D．had just been going

题型：不详难度：| 查看答案
Sichuan province ______by the earthquake，causing difficulties to the post-festival road transport.
A．were affectedB．was affectedC．had effectedD．has affected

题型：不详难度：| 查看答案
—Hi, Li Ming. Where are you going?
—Oh, it’s you—Xiaohui. I ______ you.
A．didn’t recogniseB．hadn’t recognised
C．haven’t recognisedD．don’t recognise

题型：不详难度：| 查看答案
The trains___ the travellers who want to go to other places.
A．used to carryB．get used to carrryC．are used to carryD．are used to carrying

题型：不详难度：| 查看答案
Do you know what ___ while you were away from home?
A．had happenedB．was happenedC．has happenedD．happened

题型：不详难度：| 查看答案
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.