题目：
句型转换
小题1:He went to sleep after he finished his homework. (同义句转换)
He _____ _____ to sleep until he finished his homework.
小题2:There will be more trees and flowers in the city in five years. (否定句)
There______ ______more trees and flowers in the city in five years.
小题3:He got up early. He could catch the bus. (合并为一句)
He got up early ______ ______ he could catch the bus..
小题4:He reads English once a day. (对划线部分提问)
_____ _____ does he read English?
小题5:He is too young to go to school. (改为否定句)
He is ______ young ______ he can’t go to school.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A解析：咽后壁平坦。咽分鼻咽、口咽和喉咽3部分。除与鼻腔、喉腔相通外，咽喉还与食管相通。口咽、喉咽是消化道与呼吸道的共同通道。
