We can collect rainwater when it rains ______, and use it to water plants.

(单选题)Put the following into correct order according to the passag (单选题)In Paragraph 5, “Everyone was surprised” because ______. (单选题)At first, the scoreboard showed Nadia got ______ in the Olym (单选题)Nadia was named as one of the Athletes of the 20th Century i (单选题)Three days before graduation, Bill asked Mark to talk becaus (单选题)Which of the following is NOT true? (单选题)When Bill fell down on his way home, Mark ______. (单选题)55.（ ） (单选题)54.（   ） (单选题)53.（   ）