_____ by a black hole, Li Yanping was so frightened at first, but he calmed down later and tried his best to escape.
There are many things in different areas ________ we can do to reduce the possible dangers of AIDS.
——Do you mind my opening the window? It’s a bit hot here. —— ________ , as a matter of fact.
All of the students were ______ by the ______ speech _______ by the leader.
. I have no idea _______ he left the party without _______ .
This job needs ______ patience and practice, after all, it will become ______ enjoyable experience after weeks.