Hong Kong was so busy over the Spring Festival that all the hotel accommodation was full. She phoned several hotels but none of them had a _________ room.
| A．cheap | B．nice | C．separate | D．vacant |
（2013·北京卷)Experts believe people can waste less food by shopping only when it is necessary.
| A．why | B．where | C．that | D．what |
Police have found ________ appears to be the lost ancient statue.
| A．which | B．where | C．how | D．what |
His writing is so confusing that it's difficult to make out ________it is he is trying to express.
| A．that | B．how |
| C．who | D．what |
[2013·安徽卷] From space, the earth looks blue. This is ________ about seventyone percent of its surface is covered by water.
| A．why | B．how |
| C．because | D．whether |
[2013·浙江卷] The only way to succeed at the highest level is to have total belief ________ you are better than anyone else on the sports field.
| A．how | B．that | C．which | D．whether |