The first recorded use of natural gas to light street lamps it was in the town of Frederick, New York, in 1825.
A.was
B.is
C.it is
D.were
参考答案:A
解析:结构应用。划线部分应填be动词(the first recorded use of natural gas是主语,to light street lamps是状语);又因发生在过去,用过去时;所以选项A是答案。