2961．n. [藥]青蒿素

2962．重要的是傾聽，并通過重復(fù)要點(diǎn)來表明你對對話的理解。（demonstrate，動名詞作表語）
What is important is of the conversation by repeating key points.

2963．salt n．鹽→ adj.含鹽的；咸的

2964．Since I was born and brought up in a rural town，I have a great interest in nature.Using the chance of studying abroad in my second year at college，I decided to go to Canada just because I wanted to see the beautiful phenomena there.So after I finished the study，I went to Yellowknife in the Northwest Territories.
   I clearly remember the sixth night in Yellowknife.Suddenly my host mother came to my room around 8 p.m.and told me to change clothes and go outside quickly carrying her camera.
   The northern lights were flickering in the sky!I was stunned and just stood there with my mouth open.I forgot to take pictures of the mysterious lights.
   I was so excited that I couldn't sleep at all that night.Since that night，whenever it was sunny，I went outside at night and looked at the sky.It was so cold that I lost all feelings in my hands and feet.Actually，the time of my being able to be out was limited.I had to bring her camera back to house in one hour at the most，for the camera was going to be broken because of the cold temperature.
   As I took the pictures of the northern lights，I came to find a characteristic movement of the lights.They first appear in the north part of the sky and then they gradually come down to the south part of the sky.After that，suddenly，they come in the middle of the north and south only for a while，which is the time when the best northern lights can be seen.Since it is only a few seconds for the northern lights to come down to the middle of the sky，it is very hard to get good pictures.
   The stronger the sun acts，the better and stronger northern lights flicker in the sky.That's because they occur from the collision between atmospheric gases and solar wind.Much more solar wind comes to the earth when the sun is active，which lead to the best northern lights.And the colours of the northern lights depend on the height of the collisions and kinds of gases.

（1）Why did the author forget to take pictures？
A．It was very cold outside.
B．He was shocked by the wonderful sights.
C．The lights were flickering in the sky.
D．He lost all feelings in his hands and feet.
（2）From the passage we can see that .
A．the author could stay as long as he liked outside
B．the northern lights came out every night
C．the author took a lot of pictures with his camera
D．cameras will be damaged if exposed too long in very cold weather
（3）When is the best time to see the northern lights？
A．When they appear in the north part of the sky.
B．When they come down to the south part of the sky.
C．When they are in the middle of the north and south.
D．When they rise in the east part of the sky.
（4）The author found it hard to take good pictures because .
A．the lights stay in the middle for a very short time
B．the lights of the sun affect the northern lights
C．the lights are caused by the collisions of gases
D．the colours of the lights are determined by the height

2965．（服裝、顏色等）適合 s

2966．如果你認(rèn)為他有嚴(yán)重的犯罪行為，請你提供相關(guān)的信息。
If you think he committed a serious crime，please provide .

2967．tight （adj.）

2968．He suggests that we should make good use of available resources，     can bring us such benefits as saving time and energy.（　?。?/div>

2969．實(shí)驗(yàn)前對每件設(shè)備進(jìn)行檢查是至關(guān)重要的。（vital）
every piece of equipment should be checked before the experiment.

2970．The young man's pictures，which have （顯示） the art of philosophy ，will be on show this Sunday.