问题
                    
Which floor do you live _________? —The first floor. I live _________ Room 112. [ ]
                            A: in / on 
B: on / on
C: on / in
D:in / in
                        
                        B: on / on
C: on / in
D:in / in
正确答案是:
                        
                        
                        
                    同类题型
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Lucy is__good girl. She often helps others.
What should I buy for Tom’s birthday?— How about ______camera? He loves taking photos.
All _____ is a continuous supply of the necessities of life.