Our school has developed a learning system students can do a lot of teamwork.
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.