综合类-词汇选项（8月21日）_职称英语网校

词汇选项

To understand what we are going to talk about today,you have to rely on what you have readpreviously.

A.beforehand

B.carefully

C.before

D.in advance

正确答案：C

答案解析：previously 是副词，“以前。先前”，和作副词用的before同义；beforehand 和 in advance意思相同，都是“事先，预先”的意思。

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