.
A decline in electricity output forces industrial estates and cities to burn more coal and give out more carbon to _________ the shortfall.
| A．make out | B．make up | C．bring out | D．bring up |
_____ puzzles me most is that I don’t know ______ the difference between the two lies.
| A．What, how | B．What, where | C．That, what | D．How, which |
Determination is a kind of basic quality and this is _____ it takes to do jobs well.
| A．why | B．that | C．which | D．what |
George Washington was born in 1732 in a rich family in _______ is now the state of Virginia.
| A．which | B．where | C．that | D．what |
_________anyone should want to kill her was unbelievable.
| A．Whether | B．That | C．What | D．Where |
-----Alice looks blue today.
-----Yes, I asked her, but she wouldn’t say _____ troubled her.
| A．why was it that | B．that was why | C．it was what | D．what it was that |