1. You must stop s____________, nicotine (尼古丁) is bad for your health. 2. The girl s____________ a lot of time collecting stamps last year. 3. We were glad to celebrate our motherland, China"s s__________ birthday on October 1st, 2009. 4. I like ____________ (土豆) a lot, and my mother usually cooks it in different ways. 5. Which are __________ (重的), elephants or sheep? |