Who does that shop assistant think he is? He behaves _______ he owned the store.
| A．even if | B．as if | C．as long as | D．if |
Tommy had had a three-mile drive north _____ he could turn and head back south.
| A．while | B．as | C．before | D．after |
The scientists all agreed that rules of physics, ______ we are all familiar, govern the world.
| A．to which | B．on which | C．which | D．with which |
To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.
| A．in search of | B．in advance of | C．in terms of | D．in case of |
—I will come to attend your lecture at 10:00 tomorrow.
—I’m sorry, by then my lecture will have ended and I _____ in my office.
| A．am working | B．will work | C．will be working | D．will have worked |
As we know, _______ medical examination will help us find out health problems as early as possible.
| A．normal | B．general | C．regular | D．common |