Jane arrived home ______ her children were watching TV last night.
| A．before | B．after | C．whenever | D．while |
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 careful.
| 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 |