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
—Excuse me, what’s this for?—It’s a cleaner and it to pick up dirt.
#45057
A
uses
B
is used
C
is using
D
used
－ Sorry, Mr White. But the bus was late. － You ______ away if you are late again.
#44994
A
will be sent
B
are going to be sent
C
have been sent
D
are sent
Old people must __________.
#44763
A
speak to polite
B
be spoken politely
C
be spoken to politely
D
be spoken to polite
After Nanjing Youth Olympic Games Park ________, it will become a new tourist attraction.
#44624
A
completed
B
has completed
C
is completed
D
was completed
At that moment，he was last __________ the room with his friends．
#44658
A
seen leaving
B
to see leave
C
seen to leaving
D
to see to leave