A. Choose the right modal verb in the following sentences.
1. He had been working for more than 11 hours. He (a. must b. may c. should,) be tired after such
hard work. He should prefer to get some res..
2. The teacher said we (a. must b. can c. should) read this book for our own pleasure as it is optional.
3. (A. Can B. must C. may) you stand on your head for more than a minute? No, 1(a. can't b.may not
c. must not)
4. If you want to learn to speak English fluently, you (a. could b. should c. might) work hard.
5.
Take an umbrella. It (a. might b. should c. could) rain later.
6. Drivers (a. must b. can c. could) stop when the traffic lights are red.​