While I _________ a novel, someone_________ at the door.
| A．read; was knocking |
| B．read; knocked |
| C．was reading; knocked |
| D．was reading; was knocking |
This is a big class, and ___ of the students are girls.
A. two third
B. second three
C. two thirds
Is there in the newspaper?
A. something new
B. new anything
C. anything new
About 75% percent of the students can go swimming the rest can’t.
A. while B. and C. or
--Where's Mr. Green?
--Oh, he _________ Canada.
A. has been to
B. has gone to
C. went to
— Thank you for your help — __________.
| A．Don’t thanks. | B．You’re right. |
| C．You’re welcome. | D．I’m OK. |