--Has Peter handed in his paper yet?
---I’m not sure. He _______ on it last week.
| A．was working | B．has worked | C．worked | D．had worked |
No one knows for sure when such a custom first _____.
| A．came into power | B．came into being | C．came true | D．came out |
First, we should know _____ good service sells our products.
| A．by the way | B．on the way | C．in the way | D．in a way |
I won’t go there again. They are too greedy——they me 15 pounds for the broken cup.
| A．charged | B．paid | C．offered | D．cost |
—Where is your new home now?
—In the new developed zone．But I in the downtown for five years．
| A．have lived | B．had lived | C．lived | D．was living |
more and more forests destroyed, some animals are in danger of dying out．
| A．With | B．By | C．As | D．For, |