Time is ____by hour, minute and second.
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The good news got_____from the audience.
A. Cheer
B. Cheers
C. common
It’s an _____ to sing “Jingle Bells” at Christmas.
A. cheer
B. festival
C. tradition
In some way, he _____several of his friends in the trouble.
A. involved
B. celebrated
C. invented
Waterfalls can be used to produce_____power.
A. electric
B. ancient
C. western