I don’t think Mary and Sue _____ before, ______?

The girl was often heard _______ happily in her room.

_______ one and a half days enough for the painting to be finished?—That’s enough. The painter is ill and only after _________ go on with it.[ ]

.Being examined twice a year is the rulethat every driverobey in the city .

Only when he was refused by the interviewer ________ the importance of knowing English.