Bộ 3 Đề kiểm tra Unit 8 - Tiếng anh 10 iLearn Smart World có đáp án (Đề 1)

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

16/45

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.

switch/ will be

switched/ would have been

switch/ would be

switched/ would be

Giải thích

Chọn D