III. Fill in each blank with a suitable model verb: can, might, should, could, must.
1. Where's Tom? I don't know. He .......................... be out at the moment.
2. You .......................... believe everything you read in the newspaper.
3. Don't make so much noise. We ............... wake the baby.
4. Video games ....................... be addictive, so players ................... be careful.
5. John is very good at Math. He ...................... do all math problems.
6. It's too late. I ............. go now.
7. My father ............ swim when he was 6.
8. Children ..................... drink a lot of milk.
9. When the " No Smoking " sign comes on, you ..................... stop smoking.
10. He ........................ drink so mush coffee before bedtime.
1.could
2.should
3.could
4.can-must
5.can
6.might
7.could
8.should
9.must
10.should