The running water makes the stones ______ very smooth.
—Do you have to hold our English party in the classroom? —Well. I don’t know ______if not there.
I would like to buy the black pen because I ___ that kind of pen ____ well.
The patients will have to wait all day ______ the doctor works faster.
---What can I do for you? ---I want t o buy some _____clothes.
The underlined part in the word “says” is pronounced as ______.