Have you seen Mr. Smith?—Yes. Look, he _________with a parent in the office.

Could we buy a piano, Jack? —I’m afraid there ______ enough room for one in the house.

Becky took a photo of her friends while they _________ computer games.

All the oil in the world will have __________ some day. —Yeah. What shall we use for power at that time?

_________ is said that most teenagers have problems such as Li Ming’s.