Burning garbage might be one kind of energy source that we can use to help meet our energy needs. ( Passage 2)
Children mustn’ t play with matches because （）
A. matches bum paper
B. it isn’ t interesting
C. they can be dangerous
D. they can bum a house
72（）
A. Even
B. Therefore
C. Furthermore
D. But
65（）
A. origins
B. originals
C. discoveries
D. resources
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