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

Câu hỏi

The invention of X-ray helps doctors detect many health problems, _______.

Đáp án
B. such as bone breaks, tooth decay and infections

Câu hỏi thuộc Bài tập:

E10- I-learn- Unit 7 (1)