.
._____ the mud from your shoes before coming in, or you will make the floor dirty.
| A．Removing | B．To remove | C．Removed | D．Remove |
He said he was not optimistic the future of that country.
| A．of | B．with | C．on | D．about |
The little boy many questions at me, leaving me embarrassed.
| A．cut | B．made | C．fired | D．loaded |
I when there came a knock at the door.
| A．about to go to bed | B．am going to bed |
| C．was just about to go to bed | D．have gone to bed |
You can find the map of China like a cock.
| A．looked | B．shaped | C．appears | D．seems |
The book is superior ________ that one I just finished reading.
| A．in | B．at | C．to | D．than |