From space, the earth looks blue. This is about seventy-one percent of its surface is covered by water.
| A．why | B．how | C．because | D．whether |
I am quite sure that Mr. Smith will take up his story ___ he stopped yesterday.
| A．that | B．in which | C．where | D．on which |
–What is the theme about for the meeting this evening?.
--No idea. Perhaps we will have to discuss the plan ___ a few days later.
| A．carried out | B．being carried out | C．to be carried out | D．carrying out |
Whenever a patient needs an injection of Penicillin, the doctor does need to make sure whether his patient is ___ to the medicine.
| A．sensitive | B．addicted | C．allergic | D．efficient |
With all the food supply ___, the researchers had to put an end to the wildlife protection project and returned home.
| A．running out | B．to use up | C．run out of | D．using up |
I was not hearing to the teacher, or else I ___ his questions.
A. answered B. had answered C. would have answered C. have answered