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is Jack his why teeth brushing Why is Jack I don't know why Jack is worried;___,it isn't his his problem. I don't know why Jack is worried;___,it isn't his his problem. His name is Jack London.Jack is his______ name? His first name is jack.对jack进行提问 Jack _____(leave) until his teacher comes back.why? His first name is jack （His first name is jack（ ） （ ）his first name? Where is Jack?He __________ his country. 连成句子 is jack this why teeth brushing Jack is good at his studies.(保持原意)Jack _________ _________ in his studies. Jack is nine years old.Today is his--------birthday快 His little brother is playing basketball.And Jack is ____. Jack is very tall ,but his sister is s_____. jack is tall,but his brother is very his f_____ is Jack.He is a student. Jack is stronger than any other student in his class.回答A,Jack is stronger B,Jack is the stongest what'()name?his name is jack her hiswhat'()name?his name is jackher his my your