Choose the correct forms of the verbs in brackets.
a. The kids were playing in the garden when it suddenly
- was beginning
- began
- had begun
(begin) to rain.
b. When he heard the police knocking on the door, he
- was hiding
- were hiding
- was hidden
(hide) under the bed.
c. When I walked into the bar, Danny and Fred
- was arguing
- argued
- were arguing
(argue) again.
d. The teacher was telling a story when Richard
- was asking
- asked
- had asked
(ask) her a question.
e.
- Did you listen
- Were you listening
- Had you listened
(you / listen) while Kevin was explaining the new policy?