II. 用适当的介词填空。
【小题1】Buying a piano ____ such a low price is very worthwhile.
【小题2】I pay _____ the room booking, OK.
【小题3】I’m older than you, I was born ____ June 20, 1989.
【小题4】We will arrive __ Mount Tai ___ 13:00 ____ March 13^th.
【小题5】We will decide __ the best way to go on our field trip.