Do you know a spaceship flies at about nineteen kilometers ________ second?
-Why not get your ears _______? They will be nice. -As a student, I'm not _________.
The man has ________ many things from the store.
—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!