She removed________ hat she was wearing and tried on ________ black silk one.
| A．a；a | B．the；the | C．the；a | D．a；the |
The_______waiter came up to us and said,"You are welcome."
| A．smiling | B．smiled | C．smile | D．to smile |
There is a big dog_______to a fence outside the house.
| A．tying | B．tied | C．to tie | D．ties |
Tell Mary that there's someone_______for her at the door.
| A．waiting | B．waited | C．waits | D．to wait |
Anything worth ______ is worthy of ______.
| A．doing, doing | B．doing, being done |
| C．being done, to be done | D．to be done, being done |
— Be careful, Bill! You are being followed.
— Where is the man ______ me?
| A．to follow | B．being followed by | C．following | D．following to |