When an
d where to build the new factory yet.
| A．is not decided | B．are not decided |
| C．has not been decided | D．have not decided |
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 |
-- I’m exhausted. I _____ on a project day and night.
-- You’d better have several days off after finishing it. Otherwise you might break down.
| A．worked | B．have worked |
| C．work | D．have been working |