Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

If all countries ______________ to renewable energy, the environment ______________ cleaner.

For each question, combine two sentences using the First Conditional or Second Conditional.

Chemical fertilizers are a major cause of soil and water pollution, but we can’t stop using them.

→ If we.............................

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.