问题
                    
They often have problems with______.
                            A:what will they be able to do
B:what they will be able to do
C:that will they have to do
D:that will they have to do
                        
                        B:what they will be able to do
C:that will they have to do
D:that will they have to do
正确答案是:
                        
                        
                        
                    同类题型
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