-- Is air the lightest thing in the world?
-- Not . Scientists from Zhejiang University have just developed the world’s lightest material.
| A．now | B．yet | C．then | D．again |
Have you decided which coat_______?
A．choose
B．choosing
C．to choose
Mr．Wang is very strict _____his son．And he is very _______ everything hedoes．
A．with; with
B．with; in
C．in; in
John likes walking in the open air, _____________．
A．So does Tom
B．so Tom does
C．Tom likes also
Last year he has an opportunity ______ abroad, but he gave it up.
A．study
B．to study
C．of study
________. Is this your ruler?
________,I don’t know.
A. Sorry; Excuse me.
B. Excuse me ; Sorry
C. Sorry Sorry