The boy slipped out of the room and headed for the swimming pool without his parents' _____.
There is ____ Mr. Smith at the door who wants to speak to you.
At a rough estimate, Nigeria is ____ Great Britain.
Besides this, it also provides ______ other choices for its readers.
--Mr.Smith is very strict______his students,isn’t he? --Yes,he is.He is strict______his work as well.
The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed ______ my memory.