Water，which seems so simple and common，is ________ makes life possible.
| A．what | B．that |
| C．which | D．how |
The former manager of the company was said _____ in an organized crime.
| A．to be involved | B．to involve |
| C．to have involved | D．to have been involved |
I will buy this type of car _____ the price is brought down to under 10,000 dollars.
| A．even if | B．provided that | C．unless | D．whether |
Her interesting face, with a long nose and big eyes, is what makes her _____.
| A．stand by | B．stand for | C．stand up | D．stand out |
_____ it will do us harm or good remains to be seen.
| A．If | B．Whether | C．That | D．What |
Since everybody is clear, there is no _____ in discussing the question any further.
| A．point | B．possibility | C．wonder | D．doubt |