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

Air pollution leads ______________ global warming and many health problems.

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

We should turn off the lights when we aren’t using them. We save electricity.

→ .............................

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

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

Not everyone uses electric cars. The air is polluted.

→ If everyone.............................

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 word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions.