Mr. Black must be worried about something, you can ______ it from the look on his face.
| A．react | B．read | C．recognize | D．realize |
____ the dog barking fiercely, away_____.
| A．To hear; running the thief |
| B．Hear; was running the thief |
| C．Heard; the thief ran |
| D．Hearing; ran the thief |
— Make sure you have turned off the air conditioners before going out.
— _____.
| A．Heard it | B．Got it |
| C．Forgot it | D．Made it |
How long is it _____ we last spent the holiday in the countryside together?
| A．until | B．before |
| C．since | D．After |
_____air pollution getting worse, the government needs to come up with some effective measures to deal with it.
| A．With | B．Because | C．As | D．For |
—What do you think of the equipment we’ve just bought?
—You mean _____ over there? _____ is pretty good.
| A．the one; It | B．that; That |
| C．it; That | D．that; It |