— What on earth happened to that woman selling newspapers?
— I don’t know. She ____ around here for a long time.
A.hasn’t seen | B.didn’t see | C.hasn’t been seeing | D.hasn’t been seen |
If you buy more than ten, they knock 20 pence off ______.
A.a price | B.price | C.the price | D.prices |
In order to find _______ better job, he decided to study _________ second foreign language.
A.the; a | B.a; a | C.the; the | D.a; the |
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.
A.the; the | B.a; a | C.a; the | D.the; a |
We can never expect bluer sky unless we create less polluted world.
A.a; a | B.a; the | C.the; a | D.the; the |
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
A./; the | B.the; / | C.an; the | D.the; a |