All of us found ________difficult to work out the maths problem.
| A．what | B．that | C．which | D．it |
I think the place has changed ______ over the last years.
| A．a lot of | B．many | C．lots of | D．a lot |
A: _____ do you know the book on the left?
B: I know it very well.
| A．How long | B．How often | C．How well | D．How soon |
Look! The reporter from CCTV is having an interview ______ Mr Zhou.
| A．on | B．in | C．to | D．with |
A: Could I clean the bedroom for you ?
B: No, thanks. I ______ it myself.
| A．cleaned | B．have cleaned |
| C．was cleaning | D．had cleaned |
Is there ____ European wolf in _____ zoo?
| A．a, the | B．an ,a | C．/ ,the | D．an, an |