-Where did you get this book?-I picked it up from a second-hand bookshop if you __________ know.
---What about____ passage? ----It’s too difficult____ passage for me.
---How do you like your Chinese teacher? ---_____.
----Are you sure it’s going to snow this weekend? ----_____.
----Bruce works very hard. ----_____.
----Thank you for your help. ----_____.