1.I forgot to send a birthday card______________Mai yesterday.
2. I’m going to invite my friends to come _________/ ___________ dinner tonight.
3. In the competition, everyone fell ______________ the deep and dangerous water.
4. What is the difference -------------- a boat and a ship?
5. Write…………ink and put your name -------------- the top of the page.
6. ………..first, I found the work very tiring, but……...a few weeks I got used………..it.