It is required in the library regulations that any book borrowed __________ by due time, or the borrower will be fined.
published fifty years ago, his work still attracts much attention at present.
She may have missed the train, she won’t arrive for another hour.
Many people in Haiti died from the earthquake because they didn’t have to immediate rescue.
You’d better have your shoes.
— It shouldn’t take long to clear up after the party if we all volunteer to help. — That’s right. __________.