Lucy prefers________ to________．
| A．to walk；jogging | B．walk；jog | C．to walk；jog | D．walking；jogging |
When winter comes, days get _____ .
| A．long and long | B．longer and longer |
| C．shorter and shorter | D．short and short |
There are ________ books in the National Library.
| A．twenty millions | B．twenty millions of |
| C．twenty million | D．twenty million of |
Listen! Someone_____ singing in the next room.
| A．is | B．are | C．does | D．do |
How about_________out for a walk, mum?
| A．go | B．going | C．to go | D．goes |
I don’t think he tried his best to learn English, ___________？
| A．did he | B．do I |
| C．didn’t he | D．don’t I |