—Will you see me off at the airport at ten tomorrow morning?
—Sorry, I ________ a lecture then.
| A．will be giving | B．will give | C．give | D．have given |
I bought a dress for you only 10 dollars in a sale; it was a real _____.
| A．exchange | B．bargain | C．trade | D．business |
The Olympic _____ remind us of where the Olympics are held and the characteristics of the host country.
| A．symbols | B．signals | C．marks | D．signs |
He came here without friends or ______and made his fortune.
| A．possessions | B．possession | C．wealth | D．good |
Some companies are thinking of ways to save natural _____ by making better use of the water used in the bathroom.
| A．resources | B．sources | C．power | D．energy |
One should have a _______ of right and wrong.
| A．feeling | B．knowledge | C．sense | D．idea |