Our new product will be put through a number of （） tests before being released to the public.

单项选择题The presentation of this evening’s winners will commence （） at seven following dinner at six.

A.precise
B.precision
C.precisely
D.preciseness

单项选择题Please accept our （） apology for the inconvenience this delay is causing all the passengers here at Pearson International Airport.

A.sincere
B.original
C.estimated
D.completed