33．It will be some time________we know the full results．
| A．if | B．since | C．when | D．Before |
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 |
“Would you be ______ help me?” “I'd very much like to.”
| A．kind enough | B．so kind to | C．so kind as to | D．as kind as to |