21. Someone pulled the bull violently
(a) The bull had been pulled violently by someone
(b) The bull was to be pulled violently by someone
(c) The bull had been pulled violently
(d) The bull was pulled violently
22. Circumstances will oblige me to go.
(a) I will oblige the circumstances and go.
(b) I shall be obliged to go by the circumstances.
(c) Under the circumstances, I should go.
(d) I shall be obliged by the circumstances to go.
23. The peon refused him admittance.
(a) He was refused admittance by the peon.
(b) Admittance is refused to him by the peon.
(c) Admittance was refused by the peon to him.
(d) Admittance is refused him by the peon.
24. The teacher punished the boys who had not done their homework.
(a) The boys who had not done their homework had been punished by their teacher.
(b) The boys were punished by their teacher who had not done their homework.
(c) The boys who had not done their homework were punished by the teacher.
(d) The boys who had not done their homework were being punished by the teacher.
25. It is time to ring the bell.
(a) It is time the bell rings.
(b) It is being time to ring the bell.
(c) It is time for the bell to ring.
(d) It is time for the bell to be rung.