____ they are closest friends is not clear though they live together.
| A．That | B．If | C．What | D．Whether |
The doctor told her that her badly injured husband had a 50-50 chance of ________.
| A．conflict | B．survival | C．withdrawal | D．convenience |
The old man said the accident ________careless driving，so a lot of money ________be paid by the driver.
| A．was due to；was due to | B．due to；was due to |
| C．is due to；has due to | D．is due to；was due to |
___________ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.
| A．For the first time | B．At first |
| C．It was the first time | D．The first time |
Although she is only 17 years old, she _________ drugs for two years.
| A．Addicts | B．has addicted to |
| C．has addicted | D．has been addicted to |
He risked __________ his job to see me off.
| A．Losing | B．to risk | C．being lost | D．Lost |