问题
                    
.It’s important __________ us students _______ carefully in class.
                            A:for; listening
B:of; listen
C:for; to listen
D:of; to listen
                        
                        B:of; listen
C:for; to listen
D:of; to listen
正确答案是:
                        
                        
                        
                    同类题型
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