试题 试卷
题型：单选题 题类：模拟题 难易度：普通
—It's a useful ________，so we must learn it well.
—You can ask Tom for help. He will give you a lot of ____ on Maths learning.
—Yes. With a ________ of about 55 kilometres, the bridge makes the travelling time between Hong Kong and Zhuhai much shorter than before.
试题篮
