例句： He rubbed his palm across his forehead.

例句： I hope to announce the winner shortly.

例句： There are several faults in the page of figures.

例句： He specializes in oriental history.

例句： The bank clerk peered at the customer through/from behind the grille.

例句： She started at the sound of my voice.

例句： Do you think we can clean away all these finger marks?

例句： It's impossible to tell who will win the next election.

例句： Don't wear those clothes to work; try to look more professional!

例句： I bought a keyboard in the supermarket yesterday.