He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.
| A．known to find | B．knowing to find | C．known finding | D．knowing finding |
l'm afraid that I can't attend Tom's wedding party_______next weekend.
| A．to be held | B．being held | C．held | D．is to be held |
-May I have_____break, mum?
Did you have_____ short one an hour ago?
| A．the; the | B．a;/ | C．the;／ | D．a;a |
You can never be_____careful ; the road is icy and slippery.
| A．very | B．too | C．quite | D．rather |
It is not what he said but the way he said it______annoyed me.
| A．when | B．that | C．until | D．what |
Have a careful thought of______you are doing and tell how you fell about it.
| A．what | B．which | C．that | D．whether |