This is the first time we ________ a film in the cinema together as a family.
#92830
A
see
B
had seen
C
saw
D
have seen
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After the mew technique was introduced ,the factory produced ____in 2001 as the year before.
#94886
A
as twice many machines
B
twice many as machines
C
as many machines twice
D
twice as many machines
This problem is said _____ three times. 
#92660
A
having discussed
B
to have been discussed
C
having been discussed
D
to have discussed