44.（ ）

(单选题)What is the author’s attitude towards the development of the (单选题)What is the fourth paragraph mainly about? (单选题)What can the paper-based batteries do? (单选题)What makes the paper-based batteries different from other ba (单选题)What is the main idea of the passage? (单选题)What was Mrs. Smith’s attitude to the author at the end of t (单选题)What do we know about Louis Braille from the passage? (单选题)The author didn’t finish the reading in class because ______ (单选题)From the text, we know that horses ______. (单选题)When a horse’s ears are down, we know that it is ______.