双基限时练(十六) unit 6 warmup ⅰ.单词拼写 1．i think this problem is too ________ (抽象) for me to understand. 答案 abstract 2．a ________ (直的) line is the shortest line between two points. 答案 straight 3．her________(波状的) hair looks quite smart on her head. 答案 wavy 4．to be a good teacher，you need patience as well as good
