【推荐1】Reading in the sun does ________ to our eyes. （harmful）

【推荐2】Trees are good for our health because they take in ________ (harm) gases in the air.

【推荐3】Smoking ________（伤害）not only yourself but also others.

【推荐1】The smog is __________ to people’s health these days. (harm)

【推荐2】This kind of insect (昆虫) is very ________ to the environment. (harm)

【推荐3】It is known to all that air pollution is ________ (harm) to our health.

【推荐1】Eating too much junk food ________ our health. (对……有害)

【推荐2】Eating too much may be ____________ (harm) to your health, especially in the evening.

【推荐3】It is ________ to your teeth to eat so much sweet food. (harm)

【推荐1】Lago’s i________. He loves learning things.

【推荐2】Complete the sentenced with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子）
1. Thomas Edison ________ a lot of things for us.（invention）
2. The weather is very ________ these days. Lots of students have caught a bad cold.（change）
3. Shanghai is one of the most beautiful ________ in the world.（city）
4. I am about to jump out of ________ skin.（I）
5. Sometimes toys can really make the children ________.（happily）
6. ________ is more important than anything else.（healthy）
7. I prefer to ________ a long story short.（cut）
8. The No. 2 underground has reached Xujing. It helps us travel to Shanghai ________.（quick）