1 . 阅读下面句子，根据句意，从方框中选择恰当的词或词组，并用其正确形式填空。

have an impact on                    boil down to                                 leave out significant                           boost             for instance             be known as

1. Anne Sullivan was a superb teacher who ________________ Hellen Keller.
2. Susan’s success in business ________________ her determination and bravery.
3. They’re building new hotels in order to ________________ tourism in this area.
4. John explained the case to his boss, being careful not to ________________ any important details.
5. The discovery of the new drug is of great ________________ to people suffering from heart disease.
6. We made many improvements to our house. ________________, we painted the walls and bought a sofa.
7. In the third mass extinction, which ________________ the “Great Dying” now, more than 90% of all species died out.

2 . Many students become addicted to phones, which have a severe impact ________ their study. （用适当的词填空）

3 . 毫无疑问，爱好对人们的生活有巨大的影响。
There is no doubt that hobbies ________________ people’s life.

5 . What parents say and do at home will have a great impact ________ their children.