I have no idea ________ or not he has finished the work.
| A．if | B．that | C．whether | D．which |
According to statistics, a man is more than twice as likely to die of skin cancer _________ a woman.
| A．than | B．such | C．so | D．as |
It is reported that the police will soon ____ the case of two missing children.
| A．look upon | B．look after | C．look into | D．look out |
_______ the right kind of training, these teenage soccer players may one day grow into the international stars.
| A．Giving | B．Having given | C．To give | D．Given |
At present, one of the arguments in favor of the new airport ________ that it will bring a lot jobs to the area.
| A．is | B．are | C．will be | D．were |
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |