VOCABULARY AND GRAMMAR Exercise 1: Choose the correct answers A, B, or C 1. If we plant more trees, the air ______ cleaner.
A. is
B. will be
C. was
2. Maybe people ______ travel to Mars in the future.
A. might
B. are
C. did
3. We should use ______ energy to protect the environment.
A. smart
B. robot
C. renewable
4. If people use less plastic, the Earth ______ better.
A. is
B. will be
C. were
5. If we save energy, we ______ reduce pollution.
A. will
B. are
C. did
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COMMUNICATION
Exercise 2: Choose the word or phrase that best completes the conversation
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READING Exercise 3. Look at each sign or notice. Choose the best answer (A, B, C or D) that matches its meaning.
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Exercise 4: Read the passage and choose the best option A, B, or C to complete each blank
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Exercise 5: Read the following passage and mark the letter A, B, or C to indicate the correct answer to each of the questions.
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WRITING Exercise 6: Choose the correct answer
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Exercise 7: Choose the best answer without changing their original meanings
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Exercise 8: Rearrange the words to make a complete sentence
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Exercise 9:
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