I listened to Professor Chen-Ning Franklin Yang’s lecture about his study and physics, but I failed to get its key ______ .
A. words B. notes
C. messages D. points
--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.
--Sure! Please feel _________to ask me anything!
A. fine B. free
C. OK D. right
--Excuse me, can I have this seat, please?
--I’m sorry, but it’s_______.
A. used B. sat
C. taken D. got
—You see, China is becoming stronger and stronger now.
—Yes. That’s why Chinese _____ in more and more schools out of our country.
A. are taught B. has taught
C. is taught D. have taught
The two brothers didn’t quite get along well _______the past, but now they are like peas and carrots.
A. with B. in
C. on D. since
______ English is ______ useful language.
A. A , an B. / , a
C. The , an D. / , an
