319. Could you do me a favor? 能请你帮个忙吗？　

318. Please give me a hand. 请帮我个忙。　

317. May I ask you a question? 我能问你个问题吗？　

316. Would you please open the door for me? 请你帮忙开个门好吗？　

315. How often do you go swimming? 你多久去游一次泳？　

314. How long do you watch TV every day? 你每天看多长时间电视？　

313. Kate is smarter than I. 凯特比我聪明。　

312. He can run as fast as Jim. 他跑的和吉姆一样快。　

311. This metal is harder than that one. 这种金属比那种硬。　

310. How thick is the ice here? 这儿的冰有多厚？