Fill in the blanks with: can, can’t, could, should, shouldn’t, must, mustn’t, may, might, needn’t
Some gaps may have more than one correct answer.
 
 
1.   We _____________ hurry. We've got plenty of time.
2.   Gail's flight from New York took more than 11 hours. She ______________ be exhausted and ________________ prefer to stay in tonight.
3.   Going out at night in that neighborhood ___________________ be dangerous. You _________________ avoid going there.
4.   When you have a small child in the house, you _________________ be careful. For example, you ________________leave small objects lying around. Such objects ____________________ be swallowed, causing serious injury or even death.
5.   You _________________ smoke so much, it’s bad for your health.
6.   Tracy’s engagement ring is enormous! It __________________ have cost a fortune!
7.   Please make sure to water my plants while I am gone. If they don't get enough water, they ________________ die.
8.   I ________________speak Arabic fluently when I was a child and we lived in Egypt. But after we moved back to Canada, I had very little exposure to the language and forgot almost everything I knew as a child. Now, I _____________ just say a few things in the language.
9.   I _______________ find my watch anymore. It _______________ be in the dresser but it’s not. I remember I put it in the first drawer, I’m sure, so it ____________ be in there. That's the only other place it _____________ be.
10.              Oh look! Jenny’s scarf is lying on the table. She __________ have left it here last night.
11.              It’s going to rain, you ________________ take an umbrella.
12.              The light is off in his room. Peter _______________ be sleeping now.
13.              This is a very precious book. You ___________ lose it.
14.              You ______________ wash those carrots. They've already been washed.
15.              This is a very good book. You _____________ read it.
16.              Mary gave me a letter to post. I _____________ forget to mail it.
17.              She looks pretty sick. She _______________ see a doctor.
18.              I _____________ believe that you failed your test!
19.              You ______________ run faster if you weren’t so lazy!
20.              _____________ I borrow your pen?
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