Scientists have many theories about how the universe_____.
A．came into beingB．was coming into being
C．had come into beingD．would come into being
A
考察時態(tài)。根據(jù)句意可知宇宙的形成是過去發(fā)生的，使用過去時。句意：關于宇宙是如何形成的，科學家有很多的理論。
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：單選題

.--- Have you finished your homework?
--- No. I ______ Good Voice of China on Zhejiang TV all day yesterday.
A．was watching B．have watched C．watchD．would watch

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

–This is the first time I _____ pictures with you .
–Now it is time that you ______ a picture for me .
A．took , tookB．have taken , tookC．took , have taken D．has taken , take

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

---Do you know the timetable of the school bus?
---Sure, the first trip________ at 6:30 a.m. and usually continues until 4 p.m. on weekdays. 
A．will startB．startsC．is startingD．started

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Cole Bettles ______ by a number of universities when he received an e-mail from the University of California last month.
A．had been rejected B．has been rejectedC．has rejectedD．was rejecting

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

We agreed ______ here but so far she hasn’t turned up yet.
A．having metB．meetingC．to meetD．to have met

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Every possible means       to prevent the air pollution, but the sky is not still clear.
A．is usedB．are usedC．has been usedD．have been used

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The employee you have been thinking highly of ____ reliable.
A．provesB．provingC．to proveD．being proved

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

-----Excuse me, but I wonder if Joan is available at 3:30 this afternoon.
-----I’m afraid he ________ Harry Potter and the Philosopher’s Stone.
A．will watch B．will be watching
C．is to watchD．is watching

查看答案和解析>>

同步練習冊答案