Question

3. Choose the right Modal Verb

1. I ... congratulate you on your success. - a. have to; b. might; c. must;
2. Andrew ... sing like an angel before his voice broke. - a. be able to; b. could; c. had to;
3. To my mind, the government ... take care of old people. - a. was able to; b. could; c. must;
4. Sometimes i am not as brave as i ... be. - a. may; b. need; c. should;
5 My elder brother ... speak two foreign languages. - a. can; b. may; c. be able to;

Answer 1

1 c. must;
2.b. could; 
3. c. must;
4.a. can;

Answer 2

1) must
2) could
3) must
4) should
5) can