问题描述：
【用must和have to的适当形式填空】They（）work very hard when they were young.
【用must和have to的适当形式填空】
They（）work very hard when they were young.
We（）find a good way to learn English well.
He（）attend the meeting because she goes instead of him.
You can borrow my car,but you（）lend it to others.
【用must和have to的适当形式填空】
They（）work very hard when they were young.
We（）find a good way to learn English well.
He（）attend the meeting because she goes instead of him.
You can borrow my car,but you（）lend it to others.
问题解答：
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