_______ is known to us, the dragon stands for China ______the bear symbolizes Russia.
| A．It; but | B．As; while | C．What; while | D．It; when |
We are said to be living in ____ Information Age, ____ time of new discoveries and great changes.
| A．an; the | B．不填; the | C．不填; a | D．the; a |
Scientists study ____ human brains work to make computers.
| A．when | B．how | C．that | D．whether |
I make $2,000 a week, 60 surely won’t make ______ difference to me.
| A．that a big | B．a that big | C．big a that | D．that big a |
He will come to understand your efforts sooner or later. It's just a matter of.
| A． | luck | B． | value | C． | time | D． | fact |
This training program can give you a lift at work,increase your income by 40%.
| A． | as well as | B． | so long as | C． | so much as | D． | as soon as |