1. Not only_____the students what they should do，but also make them know how to do.(teach)
老师不仅应该教学生们应该做什么，而且应该让他们知道怎么做。
2. The woman paid the boy ten dollars for washing ten windows, _____for a year.(clean)
这位妇女付给这个小男孩十美元让他清洗十个窗户，大部分的窗户已经一年没洗了。
3. Jiuzhaigou_____its unique natural scenery that tens of thousands of visitors from home and abroad are
    attracted there.(famous)
九寨沟以其独特的天然美景而闻名，吸引了数以万计的国内外的游客。
4. The statue, _____America's symbol-the Statue of Liberty，would stand in the Expo museum.(model)
这个以美国的象征--自由女神像而仿造的雕像将会站立在世博会博物馆前。
5. _____, we are always right here waiting for you.(whenever)
无论你什么时候回来，我们会一直在这等你。
6. Mary used to be shy，but since she went to college，she_____.(life)
玛丽过去很腼腆，但是自从她上了大学以来，她变得活跃起来。
7. When the boy first came to the army，he_____their arms together as they marched.(swing)
这个男孩第一次来到军队的时候，他看到士兵边行军边挥动胳膊。
8. _____, you still need a lot of luck in mountain climbing.(prepare)
无论你准备得多么充分，爬山时你仍然需要许多运气。
9. _____before you go on your business in Shanghai.(advance)
在你去上海经商前，提前预订一个房间。
10. _____, the teacher sang a funny song during the class.(amusement)
令我们非常愉快的是，老师在课上唱了一首有趣的歌曲。

1. You'd better spend your time on some ____.
    你最好把时间花在读一些有价值的书上.
2. In my opinion, selling the car at this price is____.
    在我看来,这辆车卖这个价钱不合算.
3. It proved ____ make the trip to the capital city .
    去首都的旅行证明是值得的.
4. The Christmas present I gave her the other day is _____ 20 dollars.
    前天我给她的圣诞节礼物值20 美元.
5. The____ gentleman couldn't even tell wheat from barley.
    这位可敬的绅士不能辨别小麦与大麦.