问题
                    
Do you have difficulty ____ English?
                            A:to learn
B:of learning
C:learning
D:learn
                        
                        B:of learning
C:learning
D:learn
正确答案是:
                        
                        
                        
                    同类题型
                    Tom’s uncle has devoted _________ to charity since he came to China 20 years ago.
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It’s fine today. Let’s play ________ basketball outside.
This piece of music sounds ________.
My brother would like to buy a good watch but_______ was available from that shop.