问题描述：
选词填空.---1.Can they go to the concert? ----NO,they're not_____.
2.My american friend is going to_____me next vacation.
3.She. Can't join us because she_____help her mom.
4.Why ______to linda's party?
词： do,free,have to,not go,visit,read,come
2.My american friend is going to_____me next vacation.
3.She. Can't join us because she_____help her mom.
4.Why ______to linda's party?
词： do,free,have to,not go,visit,read,come
问题解答：
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