-Did you meet with the famous space hero，Yang Liwei?
-________I had come here earlier!

[     ]
A．If only  
B．If not
C．But for  
D．For fear
I want to have a short talk with you.Could you spare a few minutes________?
[     ]
A. if necessary  
B. if possible
C. if so  
D. even if so
— I hear Johnson was badly injured in the accident.
— ________, let's go and see him.
[     ]
A. If not  
B. If so
C. If necessary  
D. If possible
I want to have a short talk with you.Could you spare a few minutes________?
[       ]
A. if necessary  
B. if possible
C. if so  
D. even if so
I want to have a short talk with you.Could you spare a few minutes________?
[     ]
A. if necessary 
B. if possible
C. if so  
D. even if so
_____, it is best not to let children sleep in the parents’ bed, since this can easily become a habit.
[     ]
A. If can
B. If possible   
C. Unless so     
D. Though possible
They landed safely on the island in the Pacific.Everything went on better than________.
[     ]
A. expected  
B. expecting
C. expectation  
D. to expect
-I hear Johnson was badly injured in the accident.
-________,let's go and see him.
[     ]
A．If not  
B．If so
C．If necessary  
D．If possible
He is only too ready to help others, seldom,_____, refusing them when they turn to him
[     ]
A. if ever          
B. if not        
C. instead        
D. if any
David apologized to me yesterday._____, I won't forgive him for it was not the first time that he had hurt
me.  
[     ]
A. If so              
B. If ever            
C. Even so          
D. Even though
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