Modern science has given clear evidence ____ smoking can lead to many diseases.
| A．what | B．which | C．that | D．where |
There can be little doubt _____ bombing Libya would drive thousands more to take up arms.
| A．why | B．Whether | C．that | D．How |
The train was crowded and I had to get into a carriage _______ there were already seven other passengers.
| A．which | B．where | C．what | D．when |
_______you write on a subject,you join in an ongoing, trans-historical conversation with others who have written about your topic.
| A．No matter what | B．Wherever |
| C．Whenever | D．No matter how |
What they are arguing over the meeting is _______ they should invest so much money in that time-consuming project, as they worry about the losing money.
| A．what | B．that | C．whether | D．how |
These reference books donated by a non-profitable organization are available for _______ wants to have it.
| A．anyone | B．whomever | C．who | D．whoever |