Jack have salad dinner?
The young men walked ______ the forest and came to a big river at last.
---Why are you standing there, Maggie?---I can’t see the blackboard clearly. Two tall boys are sitting _______ me.
Einstein, the famous scientist, was born ______ March, 1897.
Mr. Lin gave the textbooks to all the students ______ the ones who had already taken them.
It’s rather cold in most of South China ____ in spring.