It’s difficult for me to decide which one to choose, because ____ of them are good.
A．neither B．both
C．either D．each
My first teacher，Ms Yao，was very strict with________.
A．us B．we C．our D．ours
Lily and her sister look the same. I can't tell one from_______.
A．other B．another
C．the other D．others
There are many flowers and trees on ______sides of the Century Road.
A．each B．every C．both D．all
--Do you have enough students to clean the laboratory?
--No, I think we need____________ students.
A．another B．two others
C．more two D．two more
A smile costs nothing, but gives so ______.
A．little B．few C．many D．much
