`1`.B

`\rightarrow` Dẫn chứng : " His idea became ... celebrated "

`2`.B

`\rightarrow` Dẫn chứng : " He was worried ... and animals "

`3`.C

`\rightarrow` Dẫn chứng : " Since then ... our planet "

`4`.A

`\rightarrow` Dẫn chứng : " Since then ... our planet "

`5`.C

`\rightarrow` The meaning of the Earth Day : Ý nghĩa của ngày Trái Đất

`\text{@ TheFox}`

1. B (His idea became ... was celebrated)

2. B (He was worried ... plants and animals)

3. A (Environmentalists ... protecting our planet)

4. A (Environmentalists ... protecting our planet)

5. C (The meaning of the Earth Day)