—You should be careful when _______.

—Yes, I will. I’d like to know when ________ to have a rest.

—Are you _______ to go hiking with us?

— Yes, I _______.

—How do you like the film Titanic?

—I must say it’s _______ film I _______.

---There’s _________ ball on the ground．Would you please pass _________ ball to me?

---With pleasure．

---I’m sorry I went out for a smoke．I was very tired．

---There’s no ______ for this while you are at work．

----Let’s go home now.

---- ____.

—What does your grandfather like doing? 

—__________ magazines.

---Would you like _____bread?

---No, I don’t want to eat _____.

---I wonder ________ like to be an astronaut(宇航員)．

---I don’t know, but I imagine it’s exciting．

---Are you going to go shopping this afternoon? 

---No，I'm _____ tired _____go．