1．Given (give) more attention, the tree could have grown better.
2．Lightning is one of the natural phenomena (phenomenon), so you needn't be afraid of it.
3．I find that doing physical exercise a couple of times a week makes me feel more energetic (energy)．
4．According to my own understanding, a good teacher is also a good performer (perform) in class.
5．We have reached a stage where we must take effective measures to protect the environment from being polluted.
6．It was obvious to all that he had changed his original (origin) idea.
7．He made a lot of money by doing a parttime job, enabling (enable) him to go on with his study.
8．As is reported, the activity is very successful.
9．A few months after he had arrived in China, Mr. Smith fell (fall) in love with the people and the culture there.
10．Even if they met for the first time, they talked as if they were good friends.
