A lot of money has been _________ helping the mountain villages all over China.
#45013
A
spent
B
use
C
cost
D
paid
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— John, you       go out to play until your homework       .  —OK, Mum.
#44766
A
must; finishes
B
can’t; is finished
C
can’t; has finished
D
needn’t; finishes
 Personal computers ______ in 1976. It has changed the whole world.
#44711
A
have invented
B
were invented
C
is invented
D
invented
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