Look! A book is on the floor. Whose is it?—It ______be Rick’s. It has his name on it.

What you for your vacation? –I plan to visit my grandparents.

Not until he questioned the manager several times ___________ that the engineer-in-chief had gone to an important meeting.

Finally they reached an agreement, with ________.

The next thing _____must be done is to make a plan. [ ]