选出画线单词的反义词,补全句子,只写序号。 A. long B. short C. small D. thin 1. This tree is tall. That tree is ________ . 2. The mother panda is fat. The baby panda is ________ . 3. Look at this ruler. It's short. That ruler is ________ . 4. —Are they big? —No, they aren't. They're ________ .