1.      What is the main topic of the passage? A.The zipper is a wonderful invention                          B. The zipper has three parts C.     The zipper has many colors and sizes                            D. The zipper is useless 2.      The word “these” in line 5 refers to: A.zippers       B. dozens of metal or plastic teeth           C. fasteners                              D. buttons

Overall, the passage emphasizes the significance of zippers in everyday life and how they have become essential in the world of fashion and convenience.

The passage also mentions the three main parts of a zipper, which are the slider, the chain, and the stopper.

It describes how zippers have different colors, sizes, and types, making them versatile fasteners.

The passage discusses the various aspects of zippers and highlights their importance as a useful invention.

The word 'these' in line 5 refers to A. dozens of metal or plastic teeth.