It is often said that____teachers have ____very easy life.
| A．不填；不填 | B．不填；a | C．the; 不填 | D．the; a |
In ____late 19th century, Europe changed ______great deal and was playing important roles in ______international trade. 
| A．the; a; the | B．the; the; 不填 | C．the; a; the | D．the; a; 不填 |
Besides Tom, ________ Crosettes have two other sons, __________ of whom are all interested in making model planes.
| A．不填; two | B．不填; the two |
| C．the, three | D．the, the three |
Generall speaking, ____ graduate from ____ well—known university is more likely to find a good job.
| A．a, the | B．a, a | C．the, a | D．the, the |
I don’t like talking on ______ telephone; I prefer writing ______ letters.
| A．a; the | B．the; 不填 |
| C．the; the | D．a; 不填 |
--- Do you take ______ sugar in your tea?
--- I used to, but now I’m on ______ diet. I’m trying to lose weight.
| A．the; the | B．不填; a | C．不填; 不填 | D．the; a |
--- Really? Who will give ______ lecture? What is it about?
--- Professor Chen, ______ President of Peking University, about pollution.
| A．the; a | B．a; the | C．the; 不填 | D．a; 不填 |
However, in ______ recent years, Niagara Falls have come to be appreciated more for their natural beauty as ______ wonder of nature.
| A．不填; a | B．the; the | C．不填; the | D．the; a |
The invention of_________ paper was a great contribution to________human civilization.
| A．a;a | B．the;the | C．/;/ | D．the;/ |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a |
| C．/; the | D．the; a |
He was ______ medical student before he turned _______ engineer.
| A．a; an | B．the; the | C．a; / | D．/; an |
He’s so ill that his father has to send for _______ doctor.
| A．one | B．some | C．a | D．the |
Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
| A．/; the | B．/; a | C．a; a | D．the; the |
In fact of ________ failure, it is the most important to keep up ______ good state of mind.
| A．/; a | B．a; / | C．the; / | D．/; the |
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