It was nearly an hour ____the sleeping pill ______effect.
#94865
A
when; took
B
before; took
C
since; had
D
before ; had
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There was nothing they could do______.
#93165
A
but wait   
B
except waiting
C
only to wait 
D
unless they waited
Nowadays we take___ exercise a day as we need because of widely used automobiles.
#92002
A
less than half
B
less than as half as
C
less than half as much
D
half less than