用at, for, in或on填空，每词不限用一次
（1）、John, have you bought a birthday present Lisa?
（2）、David is an excellent student who always gets good marks all subjects.
（3）、The sports meeting will be held this afternoon 1:00.
（4）、Sara usually takes piano lessons. Friday afternoons and Sunday mornings.
（5）、Mr Gao teaches English a small village where people are really poor but friendly.
