根据句子意思，选择正确的词填空。5分
MoYan is famous ________ (for /as) a writer, we all like his novels. 
We often use ___________ ( chalks/ erasers) to write words on the blackboard.
You can’t go to play basketball____________ ( if/ unless) you finish your homework.
I am sure our class can          (defeat/ win ) Class 8 in the football match.
The boss ________ ( praised / dismissed ) Tom because he made a very serious mistake.