Scientists have decided to declare ____ war on AIDS in order to make ____ breakthrough in treating it.
| A．a, a | B．/, a | C．a, the | D．/ , the |
American Indians ________ about five percent of the U.S. population .
| A．fill up | B．bring up | C．make up | D．set up |
I can think of many cases ______students obviously know a lot of English words and expressions but couldn’t write a good essay .
| A．why | B．which | C．as | D．where |
When I get puzzled about some difficult problems, my teacher always encourages me and says , “Take it _________ .”
| A．for granted | B．serious | C．simple | D．easy |
____ the students in our school go to college in their teens.
| A．A good many | B．A great many of | C．A great deal of | D．A lot of |
The plant is dead. I ____ it more water.
| A．will give | B．would have given |
| C．must give | D．should have given |