Languages across the world are becoming extinct ______ endangered mammals and four times endangered birds.
| A．at twice the rate of | B．as twice fast as |
| C．twice faster as | D．twice at rate of |
______ surprised the hostess most is _______ one of her friends left the party without saying a word.
| A．What, what | B．What, that | C．That, that | D．That, what |
The arrival of the European settlers had a greaton the life of the Native Americans.
| A．fault | B．change | C．effect | D．result. |
I prefer studying English at home ______the match
| A．to watching | B．to watch |
| C．rather than watch | D．rather than to watch |
I still remember the house _____my mother and I used to stay in that evening．
| A．where | B．which | C．in that | D．the one |
They considered ______a computer, which was considered ______a great help in their work．
| A．to buy; to be | B．buying; being | C．to buy; being | D．buying; to be |