已知两个不同的平面α、β和两条不重合的直线，m、n，有下列四个命题：

①若m∥n，m⊥α，则n⊥α

②若m⊥α，m⊥β，则α∥β；

③若m⊥α，m∥n，n⊂β，则α⊥β；

④若m∥α，α∩β=n，则m∥n，

其中不正确的命题的个数是（　　）

    In China, you can travel to all corners of this big country by bus or train. It's surprising what China has done in the past ten ____(year) in terms of train travel – it now has the ____ (big) high-speed railway network in ____ world. The high-speed trains are great, and a____/lɒŋ/ train journey in China is a great way to see the country.

    China is a huge, fascinating country with so much to see. A____ a student, I love traveling ____ my parents, from big cities, to seaside hot spots, to holy mountains, to national parks, to historical sites and to ____ /smɔ:l/ villages far away.____ (get) out of your comfortable home here to some unknown places is a good experience as well. And you can eat local food, and____ (real) reach the heart of the country.

    I always love traveling outside Yibin to see our ____(beauty) country — China.

下列自然景观中属于北方地区的是（　　）

用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次（每空一词）。

A: Annie, I'm a little nervous. I have to finish ____ a book and give a report next Monday.

B: That doesn't sound too bad.

A: But I'm a very slow reader.

B: Just read quickly to get the main ideas at first. Don't read word ____ word. Read word groups.

A: But I don't understand many of the words. I have to use a dictionary.

B: Try to guess a word's ____ by reading the sentences before and after it. You ____ understand more than you think.

A: That sounds difficult!

B: Well, be patient. It takes time. You can become better by reading something you enjoy every day. The more you read, the ____ you'll be.

分别画出下列平面图形：长方形，正方形，三角形，圆．