Mr. White, along with his assistants, ______ on the project day and night to meet the deadline(最后期限).
| A．work | B．working | C．is working | D．are working |
People traveling long distances frequently have to decide ______they would prefer to go by land, sea or air.
| A．which | B．how | C．why | D．whether |
After five years of preparation, Shanghai presented the world____many said was the greatest Special Olympics.
| A．when | B．what | C．where | D．Which |
We haven’t settled the problem of_______it is necessary for him to study abroad.
| A．that | B．whether | C．what | D．if |
In peace, too, the Red Cross is expected to send help to__________there is human suffering.
| A．whoever | B．however | C．whatever | D．wherever |
If you feel tired and sick of fat food, that is ______ you have to go to the hospital for medical examination.
| A．why | B．whether | C．when | D．what |