Each of the following sentences needs either a comma or a semicolon. Put in the necessary punctuation.Many companies make sugar-free soft drinks, which are flavored by synthetic chemicals the drinks usually contain only one or two calories per serving.
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The crab grass was flourishing but the rest of the lawn, unfortunately, was dying.
The hill was covered with wild flowers it was a beautiful sight.
As I turned around, I heard a loud thump for the cat had upset the goldfish bowl.
The house was clean, the table set, and the porch light on everything was ready for the guests' arrival.