Nancy is a good student. She studies hard _______ she also likes to help others.
| A．and | B．so | C．but | D．or |
You can’t believe how terrible the fire is _______ you see it with your own eyes.
| A．though | B．because | C．unless | D．since |
Driving in rush hour traffic ______ be very dangerous, so you _____ be too careless.
| A．should; ought to | B．could; should |
| C．might; mustn’t | D．can; can’t |
Jerry is always so busy that he can hardly _________ a few minutes to talk with his child.
| A．spare | B．share | C．spend | D．save |
---________ it is from our own planet Earth to Mars!
--- Yes, it takes months to travel to Mars by spacecraft.
| A．How soon | B．How far |
| C．How long | D．How often |
—Jim took ___ one-hour ride just now.What a short time he spent finishing such a long way!
—He is ______ experienced rider.
| A．an; the | B．a; an |
| C．a; the | D．an; a |