The boy was so tired that he fell asleep _____________ his mother could take off his clothes．
| A．before | B．after | C．while | D．where |
____________ her mother came to help her for the first few months ______________ to begin her project.
| A．Only; she was allowed |
| B．Only after; she was allowed |
| C．Only after; was she allowed |
| D．Only; was she allowed |
______ a little earlier, you could have caught the last bus.
| A．If you would arrive |
| B．If you arrived |
| C．Should you arrive |
| D．Had you arrived |
People all over the world have a dream ______they will always live a peaceful life.
| A．that |
| B．what |
| C．which |
| D．when |
The researchers found clear and convincing evidence _________ happiness is the key when it comes to better health and longer lives.
| A．where |
| B．whether |
| C．how |
| D．that |
I have no doubt in my mind_____ they will be happy to accept the job.
| A．if |
| B．whether |
| C．that |
| D．what |