第六单元的单词比第五单元的单词难背。

The words in Unit Six are more difficult to memorize than those in Unit Five.

本周或下周他们将完成第五单元的学习。

They may finish up unit 5 this week or next week.

同学们，今天我们将学习第五单元A部分。

T: Today, we'll learn Unit 5 On the farm Part A.

同学们需要复习第五单元教材及练习册的54-63页。

Students must study Unit 5, Student Book and Workbook, pg 54 – 63.

苏联也同样如此，苏联1917年建立 1991年解体，我们将在第五单元学到。

The same is true of the Soviet Union which existed from 1917 to 1991, which we will study in Unit 5.