Mary, where’s Simon? I haven’t seen him for days.–He __________ Japan. This may be the third time he _________ there.

You must ______ your cigarette when you are at the gas station.

Excuse me!How long may I ________this book?—For about a week.

Why is Pierre so ?—Don’t you know? He has won the first prize in the school painting competition.

After a knock at the door, the children heard his mother’s voice him．