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 computer game ______ well and _____ out very soon.
#45027
A
sells, is sold
B
sells, sells
C
is sold, sells
D
is sold, is sold
 To make our city more beautiful ,rubbish ______ into the river.
#44541
A
must throw
B
can’t throw
C
needn’t be thrown
D
mustn’t be thrown
No one knows how the huge rocks   and ___ without our modern machines eight hundred years ago.
#45042
A
are cut; moved
B
were cut; move
C
are cut; moving
D
were cut; moved