[ Active & Passive ]
The telephone ……………………………. by Alexander Graham Bell.
A. invented
B. was invented

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Vocabulary › ViewIf you ______ in class, you are either tired or bored.
A. breathe
B. yawn
C. sneeze
D. choke
Vocabulary & Grammar › View
He’s always boasting _______ how good a guitarist he is.
A. to
B. about
C. on
D. at
