The silence of the library ______only by the sound of pages being turned over.
| A．had been broken | B．breaks |
| C．broke | D．was broken |
On stepping into his room he was astonished to find the floor covered with _____looked like tiny insects.
| A．that | B．something | C．what | D．anything |
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 |