`17,` The sun is farther 93 million miles from the Earth.

- Dẫn chứng (câu 2 đoạn 2) : The sun is farther 93 million miles from us.

`18,` Because it is much nearer.

- Dẫn chứng (đoạn 2) : When people look at the moon, it looks almost as large as the sun because it is much nearer.

`IV,`

`19,` in this office for 2 years.

- S + started/ began + to V/ V-ing + khoảng thời gian + ago

`->` S + have/has + PII + for + khoảng thời gian

`20,` taking shower to save water.

- suggest doing sth : đề xuất làm gì