阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。
Young Heroes for the Planet
Nowadays， people around the world are working to help our planet. Check out how the four young adults made a difference.
1. Who started a group to teach kids about pandas?
A. Jack. B. Kathy. C. Linda. D. Patrick.
2. How old was Linda when she invented SuperE?
A. 11. B. 12. C. 13. D. 14.
3. What was the goal of Patrick's project?
A. To fight plastic pollution.
B. To protect pandas in danger
C. To learn about native plants.
D. To use heat to make electricity.
1. A 2. B 3. A
据相关研究，经过40min完全黑暗后，人眼对光的敏感性达到最高点，比黑暗前增加25000倍，将数据25000用科学记数法表示为（ ）
If a man ______succeed, he must work as hard as he can.
Travellers ____our country enjoy the beautiful sights in Beijing, Hangzhou and many other places of interest.
We haven`t had any success_______.
﹣2的相反数是（ ）
The number of people invited____fifty, but a number of them _____absent for different reasons.
The flower is beautiful.
____________
Are you going there withthem ?
If you go,__________.
He is known to the world and has a lot of friends_______
_____your help, everything in the room is in good order now.
