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改错。 ( )1. Did you enjoy you yesterday, my children ? ________ A B C D ( )2. He taught his son how mend bikes . ________ A B C D ( )3. It's very hot outside or it's cool here in the room . ________ A B C D ( )4. Let me to help you look for your ruler . ________ A B C D ( )5. Our teacher said the earth went round the sun. ________ A B C D