---Could you come to the party this weekend? ---I’m afraid I can’t join you. I look after my grandma. A. used to B. have to C. prefer to D. belong to 【查看更多】

 

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— Could you come to the party this weekend?
— I'm afraid I can't join you. I _____ look after my grandma.
[     ]
A.used to
B.have to
C.prefer to
D.belong to

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—Could you come to the party this weekend?            
—I'm afraid I can't join you.  I _______ look after my grandma.               
[     ]
A.  used to   
B.  have to  
C.  prefer to  
D.  belong to

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