单项选择题

57（）

A．music
B．song
C．melody
D．style

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单项选择题

A．Delighted.
B．Sad.
C．Agreeing.
D．Disagreein

问答题

Fires need oxygen(氧气). Without oxygen they will die. Cover a fire with water, sand, or sometimes with your coat. (Passage 3 )