Question

5. Don't refer to the dictionary               as sometimes its meaning may be brought out clearly in a given context, (come)

不要每次遇到新的单词就查词典，有时它的意义可能在特定的上下文中明确反映出来。

Answer 1

5. every time you come across a new word考査come across和状语从句的用法。come across偶然遇见。every time，each time, next time, the first time， the last time, any time, all the time等名词短语用来引导时间状语从句，表示"每当……/每次…… /下次…一"等。