I. THEORY

A. VOCABULARIES

WordPhoneticsPart of SpeechMeaning
recycle/ˌriːˈsaɪkl/verbtái chế
reduce/rɪˈdjuːs/verbgiảm thiểu
reuse/ˌriːˈjuːz/verbtái sử dụng
pollution/pəˈluːʃn/nounô nhiễm
renewable energy/rɪˈnjuːəbl ˈenədʒi/nounnăng lượng tái tạo
carbon footprint/ˈkɑːbən ˈfʊtprɪnt/noundấu chân carbon
wildlife/ˈwaɪldlaɪf/nounđộng vật hoang dã

B. GRAMMARS

1. First Conditional (If + present simple, will + V)

  • Structure:
    • If + S + V (present), S + will + V.
  • Examples:
    • If we plant more trees, the air will be cleaner.

2. Infinitive with “to”

  • Structure:
    • S + V + to + V
  • Examples:
    • We need to save water.
    • They want to protect wildlife.

II. EXERCISE & KEYS

Exercise 1: Complete the sentences.

  1. If people ______ (recycle) more, the environment will be cleaner.
  2. We need ______ (save) energy.

Keys:

  • recycle
  • to save

Exercise 2: Choose the correct words.

  1. (Renewable / Non-renewable) energy is better for the environment.
  2. A carbon footprint shows the amount of (water/carbon) used.

Keys:

  • Renewable
  • carbon

Exercise 3: Make sentences.

  1. (If / we / reuse / bags / reduce pollution)
  2. (We / need / to / recycle more)

Keys:

  • If we reuse bags, we will reduce pollution.
  • We need to recycle more.

Exercise 4: Translate into English.

  1. Nếu chúng ta không trồng cây, không khí sẽ bị ô nhiễm.
  2. Tôi muốn bảo vệ động vật hoang dã.

Keys:

  • If we don’t plant trees, the air will be polluted.
  • I want to protect wildlife.

Exercise 5: Correct the mistakes.

  1. If we will recycle, we protect the Earth.
  2. We want save water.

Keys:

  • If we recycle, we will protect the Earth.
  • We want to save water.