If any accident ______ here tomorrow, it will be very serious.

What kind of stories do you like?—I prefer stories ______ have happy endings.[ ]

_________ a week does Tom go to the club ? — Once a week.

Excuse me. Where is Mr Green’s office?—It’s on ______ floor.

Excuse me, could you tell me ________?—There is a bank on the second floor. You can make it there.