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
–Smoking should in school.--I agree. It’s bad for our health.
#44372
A
be allowed
B
not allow
C
allow
D
not be allowed
This math problem .
#44841
A
can be easily work
B
can be easily worked
C
can is easily worked
D
may easily worked
Because of the ________ of her pet dog, Jenny was so sad and cried for a long time.
#44516
A
die
B
death
C
dead
D
dying