The teacher said that Columbus America in 1492.（2012～2013 .河北邢台一中）
| A．discovered |
| B．find |
| C．had discovered |
| D．had found |
Please keep me _____ what happens.
| A．informing by | B．informing of | C．informed of | D．informed by |
______ the chairman of the council, the vice chairman does duty for him.
| A．Absent from | B．In the absence of | C．Present from | D．In the presence of |
In the competition to be held, a gold medal, together with a certain sum of money, _____ the champion.
| A．will be given to who will win | B． will be given to whoever will become |
| C．has been given to whoever wins | D． was given to anyone who became |
You can only be sure of _____ you have at present; you cannot be sure of something _____ you might get in the future.
| A．that; what | B．what; / | C．which; that | D．/; that |
The traditional view is _____ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |