When and where to build a new factory to deal with rubbish ______.
| A．hasn’t been decided | B．haven’t decided |
| C．isn’t being decided | D．aren’t decided |
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 |
The teacher left word with our monitor ___________ she would explain the problem again next time.
| A．who |
| B．which |
| C．as |
| D．that |
Jumping out of ______ airplane at a height of 5000 kilometers is ______ unforgettable experience.
| A．an ; a |
| B．an ; an |
| C．an ; / |
| D．a ; an |