— _____ Dasan is from Canada, he can speak Chinese very well.
— I know he studies Chinese hard.

---Hi! Long time no see.
---Yes. It’s almost three years_____ we met last time.

He traveled all over the world ______ he had a man-made leg.

--- Be quick, ______ we’ll be late for the class.
--- Ok, I’m coming.

I think history is interesting,        you don’t like it.

My sister still wanted to go to school ____ she was ill.

Sarah knew nothing about it ____________ her sister told her.
A. if                      B. until                    C. since

Don’t stop working hard, ____________ you’ll enjoy the happiness of success soon.
A. and                     B. or                   C. but

They were walking ________ a forest after they swam _______ the river .

I want to have some oranges, __________ there isn’t any in the fridge(冰箱).
A. so                  B. and                 C. but