The naughty boy _________ the radio but he can’t fix it up.
| A．take apart | B．turn down | C．break down | D．pack up |
It is a ________，but is a chance as well.
| A．task | B．question | C．challenge | D．work |
How long have you ________ in the army?
| A．joined | B．come | C．stayed | D．served |
—Why did Tony leave our company?
—He was________ a better job at Haier.
| A．provided | B．offered |
| C．protected | D．owned |
________that you come here earlier tomorrow or you'll be in trouble.
| A．Be sure of | B．Make sure |
| C．It's sure | D．Make sure of |
Shut the window，________ it'll get too cold in here.
| A．but | B．so | C．however | D．otherwise |