My father lost ____keys. Now he can’t get into the house, the office or the garage (车库).
#27998
A
a pair of
B
a piece of
C
a cup of
D
a set of
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The theme park is about ____ ride from the museum. You should start out right now.
#28637
A
two hours
B
two hour’s
C
two-hour
D
two hours’
—What         are you in?—I’m in __________ 8, Grade 7.
#29335
A
class; class
B
Class; Class
C
class; Class
D
Class; class