The light bulb ______ by Edison in the middle of the 1780s.
#44649
A
is invented
B
was invented
C
invented
D
invent
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
English __________ by many people in the world.
#44455
A
use
B
uses
C
is used
D
used
This kind of medicine ________in a dry and cool place。
#44678
A
keep
B
kept
C
must keep
D
must be kept