.
It is _____that he has been addicted to the drugs and has difficulty quitting it.
| A．obviously | B．apparently | C．possibly | D．likely |
—Tony said he could fix my bicycle, but I really doubt it.
—_______. He’s very good at this sort of thing.
| A．Don’t worry | B．I couldn’t agree more |
| C．Of course | D．A piece of cake |
This article may be some advice about how to _________ oneself in society.
| A．behave | B．believe | C．perform | D．operate |
The environmental problems in China may worsen if __________ unsolved.
| A．making | B．remained | C．keeping | D．left |
_____ cleaning the doghouse was the last thing I wanted to do, I did it with all my efforts.
| A．Although | B．As | C．As long as | D．Now that |
Constant practice has erased my accent to a point _____ people think I’m a native speaker.
| A．that | B．which | C．in which | D．at which |