Personal computers ______ in 1976. It has changed the whole world.
#44711
A
have invented
B
were invented
C
is invented
D
invented
推荐题目
--What happened in that store?-- A thief _____ by the policeman just now.
#44911
A
is caught
B
caught
C
has caught
D
was caught
 —Smoking _________in the cinema. Please stop _________. —Sorry, I won’t.
#44571
A
is allowed; smoking
B
allows; to smoke
C
isn’t allowed; smoking
D
isn’t allowed; to smoke
Computers ________widely in our daily life.
#44976
A
use
B
used
C
were used
D
are used
Excuse me. When can we play badminton at the court?  Not until it _______ next week.
#44835
A
repairs
B
will repair
C
is repaired
D
will be repaired