The teacher won"t leave _______ the boy comes back.[     ]A. if                 

The teacher won"t leave _______ the boy comes back.[     ]A. if                 

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The teacher won"t leave _______ the boy comes back.[     ]
A. if                          
B. until
C. so                          
D. that
答案
B
举一反三
_______ you hurry, you will be late for school.     [     ]
A. While                    
B. Unless
C. If
D. when
题型:同步题难度:| 查看答案
John fell asleep______ he was listening to the music.  [     ]
A.after    
B.before  
C.while    
D.until
题型:同步题难度:| 查看答案
用方框中适当的词填空。
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even if , until , so that , even though , although
I don"t understand the text_______ there are few new  words in. 
[     ]
A. so    
B. because  
C. if    
D. though
基本语法。
1. I haven"t heard from him ______ he went to America.
2. He won"t be here______he is invited.
3. He will not go to the cinema ______he is very busy.
4. We found the key ______she had left it.
5. We found the books two days ______he had gone away.