His father looks young, but in fact he is ______. 
#51836
A
in the forties
B
in his forties
C
in the forty
D
in his forty
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The girls have read ______ books. 
#51263
A
two hundreds
B
hundred of
C
two hundred of
D
hundreds of
— What can I do for you? — I’d like two ____.
#51643
A
kilos of potatoes
B
kilos of potatos
C
kiloes of potatoes
D
kiloes of potatos