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
—Where did you go last night?－I _______to go to Lily’s birthday party.
#44950
A
have been asked
B
have asked
C
asked
D
was asked
The windows must _________ before you leave the room.
#44851
A
be closed
B
are closed
C
close
D
be close
—Do you plant trees in spring, Mike?—Yes. Many trees ________ in our city every year.
#44650
A
plant
B
are planting
C
have planted
D
are planted
Thanks to the Internet, different kinds of information in a short time.
#44436
A
can be learned
B
has been learned
C
can learn
D
has learned
Here are the photos of my favourite football players in Beijing.
#44918
A
who were taken
B
that took
C
which I was taken
D
that were taken