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A. had been on has begun has been on had begun
three and a half hour three and half an hour three and a half hours three hours and half an hour
half an hours' half an hour's half an hour an hour and a half
half hour half an hour an half hour half a hour
walking to walk walked Walk
had been waiting has waited was waiting waited
to practice playing practicing playing practicing to play to practice to play
an hour and a half one and a half hour
one and half an hour one and half hours
walking to walk walked walk
an hour half half a hour half an hour a hour half
so as for so as to in as to so as in
two and a half hour two and a half hours two hour and a half two hour and half an hour
half hour of sport half an hour sport half an hour of sport for half an hour sport
an half hour’s a half hour’s half an hour’s half a hour’s
goes went has gone has been
half an hours' half an hour's half an hour an hour and a half
How soon, one hour and a half How long, one and a half hours How soon, one and half hours How long, one hour and half
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