To save the drowning child，the boy plunged into the icy water without hesitation，_______his own safety．

That is ______ interesting book , so I read it ______ two hours every day.

However frequently 　　　　, the textbook play acted by my classmates still interests us every year.

(湖南省雅礼中学2009届高三第七次月考 )A chance conversation with a stranger lead a person to discover how little is known of other religions.

Mr Li, I can’t understand everything in class.— Don’t worry! I’ll _____ _ the main points at the end.