1£®The door remained locked(lock) when he came again.

2£®My dream is to enter(enter) a key university.

3£®Mitochondria can only be passed onto the next generation by the mother.

4£®I found myself in hospital when I came to myself(me)£®

5£®Some people say that Mozart is one of Europe's greatest composers(composer)£®

6£®My uncle went to Tibet in 1951.He has been living(live) there ever since.

7£®She took the job for various(variety) reasons.

8£®Firstly£¬in my mind£¬UN is an organization representing(represent) peace and development.