________ help the people in the snowstorm in the South made him worried.
| A．Not known how to | B．Unknown what to do to |
| C．His knowing not how to | D．His not knowing how to |
If they had known what was coming next, they __ their mind.
| A．may change | B．could change | C．must have changed | D．might have changed |
New Zealand's universities offer a wide __ of courses in many fields, including the arts, economics, communications and technology.
| A．range | B．process | C．trend | D．bunch |
My teacher has never lost his temper; that is to say, he is a __ man.
| A．generous | B．mild | C．rude | D．tough |
in the ticket hall for almost an hour, I suddenly realized I had left my ID card home.
| A．To wait | B．To have waited | C．Waiting | D．Having waited |
— Watch out! The petrol __.
— Oh, my God. We have to find a service station soon enough.
| A．runs out | B．has run out | C．is running out | D．has been run out |