（一）
用适当的介词或副词填空。
1. There are 12 children ______ board the ship.
2. I’d like to eat out, but ______ the other hand I should be trying to save money.
3. Don’t worry; help is ______ hand!
4. They say that genius often goes hand ______ hand with madness.
5. Did you hand your homework ______ on time?
