问题描述：
句型转换she began to learn english after she entered a primary school
She began to learn english after she entered a primary school.(改为同意句)
She __________ begin to learn english __________ she entered a primary school.
She began to learn english after she entered a primary school.(改为同意句)
She __________ begin to learn english __________ she entered a primary school.
问题解答：
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