We had to wait until the meeting was over.
A. started
B. ended
C. went on
D. came back
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Life is changing all the time. We don't know what will happen at times.
A. sometimes
B. sometime
C. some times
D. some time
I'm afraid she's not here at the moment.
A. then
B. now
C. later
D. soon
Thank you for sending me letters on the internet. D
A. airmails
B. post cards
C. ordinary letters
D. e-mails
The book must be given back to the school library.
A. kept
B. borrowed
C. returned
D. lent