We are confident that the environment __________ by our further efforts to reduce pollution.
| A．had been improved |
| B．will be improved |
| C．is improved |
| D．was improved |
There were two boys in the lab,did the experiment successfully.
| A．the clever of whom | B．the cleverer of whom |
| C．the clever of them | D．the more clever of them |
The customer didn’t chooseof the coats and went away without looking at a third one.
| A．both | B．all | C．any | D．either |
—How can I use this washing machine?
—Well, just refer to the.
| A．explanations | B．expressions | C．introductions | D．directions |
He spent too much time talking onphone while we were all busy atwork..
| A．the; / | B．a; / | C．/ ; / | D．the; the |
19. I don’t know why he blamed the accident _____ me.
| A．at | B．to | C．for | D．On |