选出并改正下列每句中的错误。
(     ) 1. Did you helped your mother yesterday?
              A            B                             C              ______________________________  
(     ) 2. My mother didn't cooked fish yesterday.
                                 A        B       C            ______________________________
(     ) 3. In Monday it rained here.
             A                    B      C            ______________________________
(     ) 4. I   am   short then.
           A    B      C               ______________________________

【考点】实义动词,介词,一般过去时，动词过去式

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