If you want a double room, _____ will cost another ￡15.
| A．as | B．which | C．what | D．that |
Evidence has been found through years of study __________ children's early sleeping problems are likely to continue when they grow up.
| A．why |
| B．how |
| C．whether |
| D．that |
(2009·重庆) We should consider the students' request __________ the school library provide more books on popular science.
| A．that |
| B．when |
| C．which |
| D．where |
(2009·湖北) His efforts to raise money for his program were __________ because no one showed any intention to take a cent out of their pockets.
| A．in place |
| B．in sight |
| C．in effect |
| D．in vain |
The fact has worried many scientists __________ the earth is becoming warmer and warmer these years.
| A．what |
| B．which |
| C．that |
| D．though |
(2009·浙江)—Is there any possibility __________ you could pick me up at the airport?
—No problem.
| A．when |
| B．that |
| C．whether |
| D．what |