After Ya’an earthquake the school practiced an emergency drill showing the children how to         find their “safe place”____. 

As a student in Senior Three, I must work hard． ___________, I should take exercise to strengthen my body．

—You all like your English teacher?—Yeah, she devotes herself____ to teaching and it earns her a good reputation．

Trees are good for human being. We can’t plant them __________ many.

Mr Brown is__________respected by his colleagues.