英语 ：ON BY AT 等介词选择题用法.
1.I usually go to Shanghai Library with my cousin __C___ Sunday morning.
A.in B .at C.on D.by
* on + 具体一天 -----on a quiet night (at night 中间如果有修饰词也要变ON?
2.Mary lives in a village.She has never traveled __A?____ a train.
A.on B.by C.at D.through
*B ,C 排除 A D 选哪一个?
3.These days the doctor in that hospital spend more time ___A?__ the H1N1 patients.
A.to B for C.by D.with
* 何知识点?不是SPEND ...ON ...没有这个选项