---How can we reduce CO2 in our home?
---It’s easy． off your TV or computers when you’re not using them, and you’ll greatly reduce it．
| A．Turn | B．To turn | C．Turning | D．Turned |
—If he ______, he _____ that food.
— Luckily, he was sent to the hospital immediately.
| A．was warned; would not take |
| B．had been warned; would not have taken |
| C．would be warned; had not taken |
| D．would have been warned; had not taken |
I’m not feeling well in the stomach, I _____ so much fried chicken just now.
| A．shouldn’t eat | B．mustn’t eat |
| C．shouldn’t have eaten | D．mustn’t have eaten |
____________, the new machine is now in large production.
| A．With the solved problem |
| B．With the problem solved |
| C．With the problem solving |
| D．With the problem to solve |
— Sorry, I have to ____ now. It’s time for class.
— I’ll call back later
| A．hang up | B．give up |
| C．hold up | D．take up |
The factory used 65 percent of the raw materials, the rest of which _______ saved for other purpose.
| A．are | B．is | C．were | D．was |