What’s wrong with him? I haven’t seen him _____ last Wednesday.A. on B. since C. by
—This watch is too expensive.----Well, we have got some _______ ones. They are over there.
There are two_________ books in the library.
Turn right ___the third street, you will see the supermarket _____your left.
I'd like to go to the ________ to get some money.
The T-shirts are half price. Why not __________?