13. For many cities in the world, there is no room to spread out further, _______ New York is an example.
14.
| A．for which | B．in which | C．of which | D．from which |
Living on Mars isn’t ________ as it sounds.
| A．as strange an idea | B．as idea strange |
| C．as a strange idea | D．as an idea strange |
Visitors ________ take an animal or any other item prohibited by the Expo Bureau to the Expo Park.
| A．needn’t | B．may not | C．mustn’t | D．will not |
One way to understand thousands of new words is to gain ________ good knowledge of basic word formation.
| A．/ | B．the | C．a | D．one |
The teachers in Senior High Three would like to answer ______ worry the students, especially when the College Entrance Examination is coming.
| A．all the questions they think | B．whatever questions they think |
| C．any questions they think | D．whatever questions they think that |
_____ ashes from the volcano in Iceland have caused problems for air traffic and business, scientists don't think it will have long-term effects on human health.
| A．Since | B．As | C．While | D．Because |