1 . The heroes who devoted their lives to the country in the war to Resist U.S. Aggression and Aid Korea should always be________ (钦佩) for their bravery and loyalty. (根据汉语提示单词拼写)

2 . The young tree ________ well when it is planted.

A．mustn’t watered	B．should be watered
C．must water	D．should water

3 . Chemistry can be d ________ as a subject in which chemical changes in matters are dealt with. （根据首字母单词拼写）