It's surprising that your brother ______Russian so quickly—he hasn't lived there very long.
| A．picked up |
| B．looked up |
| C．put up |
| D．made up |
I saw the boy _____ out a moment ago.
| A．run | B．runs |
| C．how to run | D．running |
He was made _____.
| A．go | B．gone |
| C．going | D．to go |
Returning to the room, _____.
| A．the book was lost | B．I found the book missing |
| C．the book was missing | D．I found the losing book |
_________ in the fields on a March afternoon，he could feel the warmth of spring．
| A．To walk | B．Walking |
| C．Walked | D．Having walked |