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

Câu hỏi

Experts say that if you mixed these chemicals together, there might be a massive explosion.

A. these chemicals

B. massive explosion

C. might be

D. if you mixed

Đáp án
D. if you mixed

Câu hỏi thuộc Bài tập:

E10- I-learn- Unit 5 (2)