Britain announced tighter security measures this week, with plans ______ full-body scanners at Heathrow airport within three weeks. 
#91560
A
to use
B
to be using
C
being used
D
having used
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Whether you believe it or not, it is _________ that causes your illness.
#91474
A
because of your overweight
B
you are so overweight
C
because you are overweight
D
your being overweight
The boys and girls were happily making a snowman, _______ with cold.
#91230
A
their faces red
B
their faces were red
C
their faces turned red.
D
their faces to be red