---Please _______ us in the discussion. ---I'd like to, but I'm ______ busy at the moment.
To our surprise, the painting considered______ should have won the prize.
It made all the Chinese happy _____ China succeeded in sending up the first manned spaceship.
---May I take your order now? ---_______.
She was so angry at all ______ I was doing ______ she walked out.
The old woman had a letter from her son in the army_____ to her.