—        have you been married? —For twenty years.

---Which would you like to eat, bread or sandwiches?  ---___________. Please give me some dumplings.

—Do you like Zhou Jielun or Liu Dehua?    — ________. I am not their fans.

-- Lucy, when did you plant trees, last Saturday or Sunday ?   --_________. We did it last Friday. 

--- What ________ useful book ! ---Yes, it is. But I found___________ difficult for me to read.