our teacher told us that sound travels____than light. A much more slowly B more fast C much fasterD much slowly

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our teacher told us that sound travels____than light. A much more slowly B more fast C much faster
D much slowly

A
这是一题既考语法又考常识的题.声速比光速慢,所以先排除B和C,慢得多的用法:much more slowly (副词用法),再排除D

c