In time of serious accidents, _______ we know some basic things about first aid,we can save lives.
| A．whether | B．until |
| C．if | D．unless |
On August 15th, 2012, many people volunteered to Lei Feng Memorial in Fushun, Liaoning Province ___________ this great soldier(1940---1962).
| A．in memory of | B．in favor of | C．in case of | D．in support of |
Jack, please do not _______ yourself in that matter, or you will be in great trouble.
| A．promote | B．improve | C．compete | D．involve |
Yoga is a kind of _______ activity. It can make people _______.
| A．relaxing, relaxed | B．stressed, stressful |
| C．relaxed, relaxing | D．stressful, stressful |
We didn’t know you were in trouble at that time, _______ we would have given you a hand.
| A．therefore | B．unless | C．otherwise | D．so |
---When are you going to travel to Beijing?
---The train ______ at six tomorrow morning, and I _______ for the station at four o’clock.
| A．leaves, leaves | B．is going to leave, am going to leave |
| C．is going to leave, leaves | D．leaves, am going to leave |