题目内容：

she must finish her homework in the evening.改成一般疑问句并否定回答
the boy is writing a letter.将be.改成can
we must keep the reading room clean改成祈使句
a lion can run very fast改成一般疑问句并肯定回答

优质解答

很高兴能够在这里回答你的问题,
Mush she finish her homework in the evening?
No,she needn't.
The boy can write a letter.
Keep the reading room clean.
Can a lion run very fat?
Yes,it can.