We have no doubt that if the students’ interest in the subject is motivated, they will ________ the challenge and commit more of their time and energy to their studies.
| A．face up to. | B．keep pace with. |
| C．put up with. | D．live up to |
A red sky in the morning _____ to be a sign of bad weather.
| A．says | B．is saying |
| C．has said | D．is said |
Don't you know _____, my dear friend, it is you that she loves?
| A．who | B．which | C．that | D．what |
Most air pollution is caused by the burning of _________ like coal, gas and oil.
| A．fuels | B．articles |
| C．goods | D．products |
I bought a dress for only 10 dollars in a sale; it was a real _________.
| A．exchange | B．bargain |
| C．trade | D．business |
—Shall we go out for a walk?
—Sorry. This is not the right _________ to invite me. I am too tired to walk.
| A．moment | B．situation |
| C．place | D．chance |