The two boys are fighting _______ each other.
The summer vocation lasts ______ the beginning of July to the end of August.
The young man ________ is a friend of mine.
He asked me______________.
Loud music and other noises can annoy neighbors, _________ at night.
---How was _________ dinner at Li Lei’s house?---It was great. Li Lei’s mum is ________ wonderful cook.