Complete the sentences with must, may, minght, could or can039;t and

Complete the sentences with must, may, minght, could or can't and suitable verb from the box in correct form.
Воткнуть слова в подходящей форме. Слова: come;be; explain;stay;feel;find;remember;tell;be able to.
1. She could be telling the truth-it's hard to say
2. Simone says she ....to the party, but she's not sure
3. I'm afraid I can't I can't help, but maybe my brother... the answer to you
4. My grandparents.... with us next week-they'll let us know by Friday
5. You.... Carrie, surely? She used to be in our class
6. You... serious-you're not really going to leave, are you?
7. I .... finish the report by Friday-I'll do my best
8. She .... nervous, having to give a presentation to so many people.
9. You .... this book useful for your essay.