We are living in an age ______ many things are done on computer.
| A．which | B．that | C．whose | D．when |
Had it not been for the fact that about 30 pupils __________ in the state of Connecticut a fortnight ago, their parents ___________ in deep sorrow now.
| A．had been killed, wouldn’t be |
| B．were killed, couldn’t be |
| C．would have been killed, mightn’t be |
| D．should be killed, wouldn’t be |
________, you'll never be able to persuade him.
| A．However hard may you try |
| B．Try however hard you may |
| C．Hard as you may try |
| D．Try hard as you may |
Experts have found that the disease will lead to a greater increase in the number of sufferers unless ________ seriously when the symptom first appears.
| A．treated | B．to be treated |
| C．being treated | D．be treated |
What shall we use for power when all the oil in the world has ________？
| A．given out | B．put out |
| C．held up | D．used up |
Cloning humans has been _____ in the science world for many years and it is likely to continue .
| A．ridiculous | B．contemporary |
| C．controversial | D．contradictory |