=>
30. If I were you, I would use energy efficient light bulbs.
31. He came up with a great idea for our environmental project.
32. Because of being absent from the meeting, she didn't know the resolution.
33. If I had enough free time, I would take part in the volunteer program.
34. If we don't reduce our plastic waste, we'll threaten our own existence.
35. If I didn't live by the sea, I wouldn't be worried about global warming.

30. If I were you, I would use energy efficient light bulbs.

(Nếu tôi là bạn, tôi sẽ sử dụng bóng đèn tiết kiệm năng lượng.)
31. He came up with a great idea for our environmental project.

(Anh ấy đã đưa ra một ý tưởng tuyệt vời cho dự án môi trường của chúng tôi.)
32. Because of being absent from the meeting, she didn't know the resolution.

(Vì vắng mặt trong cuộc họp nên cô không biết cách giải quyết.)
33. If I had enough free time, I would take part in the volunteer program.

(Nếu có đủ thời gian rảnh, tôi sẽ tham gia chương trình tình nguyện.)
34. If we don't reduce our plastic waste, we'll threaten our own existence.

(Nếu chúng ta không giảm thiểu rác thải nhựa, chúng ta sẽ đe dọa sự tồn tại của chính chúng ta.)
35. If I didn't live by the sea, I wouldn't be worried about global warming.