The most important thing about cotton in history is _____ part that it played in ____ Industrial Revolution．
| A．/; / | B．the; / | C．the; the | D．a; the |
---He suggests the number of cars should be limited to stop air pollution.
--- __________, the idea is not very practical.
| A． Sounds good as it | B．As it sounds good |
| C．As good it sounds | D．Good as it sounds |
.Scientists are trying to develop a special material, _______ they will make use of in space.
| A．it | B．that | C．what | D．one |
The education of _______young is always _______ hot and serious topic in modern society.
| A．the; / | B．a; the | C．/; the | D．the; a |
_________the authorities continue to crack down football betting _________a new hope in the future.
| A． If only; Chinese soccer can see | B． Only if; can Chinese soccer see |
| C． If only; can see Chinese soccer | D． Only if; see Chinese soccer can |
.—Why, Jack! Someone seems to have called you over there.
—Yes? I ________ that.
| A． am not realizing | B． haven’t realized | C． didn’t realize | D． don’t realize |