The defence works ______ built long ago to keep the enemy away.
A. were
B. has been
C. had been
D. was
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A teacher of English and class teacher _______ us something about volunteer workers.
A. are telling
B. is telling
C. are given
D. were given
The whole family _______ TV attentively.
A. are watching
B. is watching
C. is seeing
D. are seeing
Both rice and wheat _____ grown in our country.
A. is
B. are
C. was
D. were
The following ______ some other mental diseases.
A. being
B. are
C. was
D. were