1. Are you free... [Saturday night?] 2. Are you doing anything... [Saturday night?] 3. Let me check my calendar. 4. (informal) Do you wanna... [see a movie?] 5. (formal) Would you like to... [join me for dinner?] 6. I'd love to! 7. Sounds great! 8. I'd love to, but I have another commitment. 9. I don't think I can. 10. Maybe another time.
Fact
The largest cell in the human body is the female ovum, or egg cell. It is about 1/180 inch in diameter. The smallest cell in the human body is the male sperm. It takes about 175,000 sperm cells to weigh as much as a single egg cell. .. More >>