He was about to leave ___ Tom arrived so he stayed a little longer.
The head teacher told us that most of the students ______ born in the 1990s.
______ prevent her from attending the meeting, he took away the key to their car ______.
This is the first time that the Chinese woman astronaut ______ sent into space.
It is reported that the countries attending the opening ceremony of the London Olympics ______ 229.
In recent years______global warming is becoming______concern for people all over the world.