1. 在图书馆:
Tom: Hi, Tim. What are you doing here?
Tom: I need to borrow a book on space.
Tim: Let's search for them together.
Lucy: Hi, Ben. What's your favorite subject?
Ben: I love math. How about you?
Lucy: I enjoy English. Do you want to study together after school?
No problem. 没问题
Alright.好的
Okay, sounds good。好的,听起来不错。
Sorry, I'm afraid…对不起,我恐怕(否定含义