-Excuse me, is this the right way to Children’s Park?- Sorry, I’m not sure. But it____ be.
—Whose Chinese book is this?—It could _____. He studies Chinese.
When he saw a wallet on the ground, he ______at once and turned it to the police.
He got the first prize in the singing competition. ____ exciting news!
The moonlight goes ____ the window and makes the room bright.
— We’ll have a____ holiday. What about going to Tibet? — Sounds great.