Question

I have a meeting ________ Monday evening．

1. A.
   on
2. B.
   at
3. C.
   in
4. D.
   for

Answer 1

A
在某一天前用介词on；在上午，下午，晚上前用介词in；但如果在morning, afternoon, evening前有定语修饰时，应用介词on而不用in，指具体的某一天(上午，下午，晚上)．根据句意应选A．但要注意若morning, afternoon, evening和星期前有this, that, last, next等限定词修饰时，前面一律不用介词．