短文改错 （10小题，每小题1分，共10分）
I still remember nay middle school life in Tianjin yet.
46.________
I was then in a school for students from Tibet. As we were
47.________
all left home at early age,we met lots of problems in
48._________
our daily life. We had to do the washing, cleaning and shopping by us. However, we seldom felt lonely or
49._________
helplessly. We enjoyed our happy life. At weekends,
50._________
we would play basketball, swimming in the pool or go
51._________
for a picnic. We were living in a big family. We treat
52._________
each other as brothers and sisters. If any one of us had
53._________
any difficulty in our life and study, the other would
54.________
help him out. It has been five years when we graduated, but those memories are as sweet as ever before.                             55._________