Question

a. _____ I do it at once ?

I. Should

II. Ought

III. May

IV. Could

b. William _____ finish his work

before 06:30 P.M.

I. Had to

II. Shall

III. Will

IV. Could

c. You _____ always keep your word.

I. Could

II. Should

III. Shall

IV. Must​

Answer 1

Answer:

"

1. may/ should
2. had to
3. must"

Explanation:

hope it's helpful

Answer 2

Answer:

(a) should

(b) had to

(c) must