The United States _______one of the lowest smoking rates -25.5 percent of the population.
#103540
A
is
B
have
C
has
D
are
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Hurry up!  The train ______. You know it ______ at 8:30 am.
#100081
A
leaves; leaves
B
is leaving; is leaving
C
leaves; is leaving
D
is leaving; leaves
You     to ask the teacher if you want to hace a day off.
#101728
A
are supposed
B
suppose
C
are allowed
D
allow
No matter what substance it may be, it is ________ atom. 
#101591
A
resulted from
B
formed
C
made up of
D
made up with
 In no time ________ smoke coming out of the house.
#101549
A
did we see
B
we saw
C
are we seeing
D
we see