问题
                    
Only an hour ago ________ out why he was absent.
                            A:did the teacher found
B:the teacher found
C:did the teacher find
D:had the teacher found
                        
                        B:the teacher found
C:did the teacher find
D:had the teacher found
正确答案是:
                         
                        
                        
                    同类题型
                    Take your time—it’s just _____ short distance from here to _____ restaurant.
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