. Do what you think is right, ______ you will gain a surprising happy ending.
| A．and | B．but | C．before | D．/ |
The notice came around two in the afternoon __________ the meeting would be postponed.
| A．when |
| B．that |
| C．whether |
| D．How |
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 |