Mr．Barret doesn’t think that all bad language should be allowed．In his opinion, there are _____ that should be kept up．
| A．degrees | B．levels | C．limits | D．standards |
He got home late ____________ the traffic was heavy.
| A．because that | B．because |
| C．because of | D．in order that |
I think it was his attitude ___________ annoyed the teacher.
| A．which | B．what |
| C．that | D．to which |
I must say your food is excellent but your service really needs __________.
| A．to improve | B．improved |
| C．being improved | D．improving |
We _______ the difficulty together, but why didn’t you tell me?
| A．should face | B．might face |
| C．could have faced | D．must have faced |
We ________ the bridge for over two years and it will be half a year before it’s completed.
| A．are building | B．have built |
| C．have been built | D．have been building |