28 What is the main idea of the first paragraph?
(A) Coffee-drinking has become popular in the past 20 years.
(B) There are different ways of enjoying a cup of coffee.
(C) It is caffeine that fascinates the lovers of coffee.
(D) Starbucks is the trendiest coffee shop.

第一段的主要思想是什麼？（A）咖啡飲用在過去20年中變得流行起來。（B）有不同的方式享受一杯咖啡。（C）是咖啡的愛好者的咖啡因。（D）星巴克是最時髦的咖啡店。