用方框中所给短语的适当形式填空

grow up；make sure；try one's best； be good at；keep on

【1】Don't worry.I'll _____ to help you.

【2】I am going to be a doctor when I _____.

【3】—I'm leaving now.

—_____ you turn off the lights and the computer.

【4】“Please ____ discussing this math question after class，” Mr.Li said.

【5】Jane _____ English and she did well in the English exam.