The light bulb ______ by Edison in the middle of the 1780s.
#44649
A
is invented
B
was invented
C
invented
D
invent
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The opening ceremony (开幕式) of the 2014 World Cup in Brazil on June 12.
#44396
A
will take place
B
was taken place
C
will hold
D
was held
Personal computers ______ in 1976. It has changed the whole world.
#44711
A
have invented
B
were invented
C
is invented
D
invented
－ 80% of our work ______ finished. － Really? It’s ______ hard work, you know.
#44995
A
have been; such
B
has been; such
C
has; such a
D
is; so
I won’t leave my office until my work _______.
#44474
A
will finish
B
are finished
C
is finished
D
was finished
We will fly a kite as soon as your homework ______.
#45025
A
finishes
B
will be finished
C
has finished
D
is finished