21. A mixed diet is best.

22. Cats should be exterminated because they spread disease.

23. The parcel post will decrease the profits of the express companies.

24. A good book is opened with expectation and closed with profit.

25. Merchants should charge for delivering purchases.

26. The object of the Child Welfare Exhibit is to promote the best interests of children.

27. One of the best enactments of our time is the Child Labor Law.

Exercise 213—Smooth Connection

We may as well confess at the beginning that smooth connection between sentences and paragraphs is a hard thing to learn. Primarily, it depends on clear thinking. In Exercise 135 we saw that the idea of one sentence must grow out of the idea of the preceding one. It is the same with paragraphs. The thought must develop gradually from one to the next. Each paragraph, we know, represents a unit within the larger unit of the composition; each represents a division of thought. Not infrequently the thought of one division differs considerably from the thought of the next. The tying together of such units is sometimes hard. It may be done in one of the following ways:

1. By repeating at the beginning of the new paragraph or sentence part of the preceding paragraph or sentence.