问题描述：
He`s good at dancing._________________ I spend an hour doing my homework every day._______________
My sister runs faster than I.______________
Jack often helps me to study English.___________________
I like history best._______________________
改同义句.
My sister runs faster than I.______________
Jack often helps me to study English.___________________
I like history best._______________________
改同义句.
问题解答：
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