Mother's Day comes _______ the second Sunday of May．（ ）
A．inB．onC．atD．for
It is important ___us to make full use of time．（ ）
A．forB．ofC．with
The woman ___is talking with my mother is our class teacher．（ ）
A．whichB．whoC．whose
The school sports meeting will be ___because of the heavy rain．（ ）
A．put upB．put onC．put off
David never fights with his classmate，____？（ ）
A．does heB．doesn't heC．isn't he
The new railway ___in our hometown in 2013．（ ）
A．was builtB．is builtC．has built