The first use of atomic weapons was in 1945, and their power ________ increased enormously ever since. 
#104766
A
is
B
was
C
has been
D
had been
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The film TITANIC ____ a true story.
#103178
A
based on
B
base on
C
was based on
D
had based on
When you ______with the dictionary, don’t forget to put it back on my desk, will you?
#101912
A
will finish
B
are finishing
C
will have finished
D
have finished