读下面一段短文，用括号内所给单词的适当形式填空。American summers are filled with outdoor picnics, baseball games a

读下面一段短文，用括号内所给单词的适当形式填空。
American summers are filled with outdoor picnics, baseball games and swimming pools. Summer in America is a time (76) to enjoy (enjoy) the outdoors, no matter how hot it might be. Let’s take a look at some of the popular drinks.
Lemonade is (77) the commonest (common)of all American summer drinks. It (78) is made (make)by mixing lemon juice, water and sugar. It is usually served very cold, with ice. Ice tea is another popular summer drink in America. Ice tea is usually served in a tall glass of ice. Many Americans(79) choose (choose) to add sugar to sweeten the drink. This drink is often drunk in the afternoon while relaxing in the shade. Ice tea is now also sold by the bottle , at almost any store in America.
The Slurpee, a famous American drink in recent years, is a great way to cool off in the summer heat. It is a mix of ice, sugar and fruit juices. However, the drink is mostly made of ice. They can (80) be bought (buy) at most small convenient stores. Slurpees are popular with young Americans. Milkshakes have a long history in America . It is made of a mix of ice cream , milk and flavoring.

解析：【小题1】不定式to enjoy做定语，修饰a time 【小题2】因为是of all American summer drinks所以是最高级the commonest 【小题3】它是被制造,用被动式is made 【小题4】用一般现在时，主语是Many Americans 谓语是复数choose 【小题5】他们是被买，用被动语态：can后面接be bought

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