They decided to drive the cow away ______ it did more damage.
| A．unless | B．until | C．before | D．although |
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 |
---- Did you know any German before you got to Berlin?
---- Not a single word _________.
| A．have I learned | B．had I learned |
| C．I’ve learned | D．I had learned |
Your new product ________ better if it is advertised on TV.
| A．sells | B．sold |
| C．will sell | D．would sell |