III:
Mark the letter A, B, C or D on your answer sheet to the correct answer to each of the following questions.
Trả lời câu hỏi dưới đây:
________ laser beam can be moved easily in all directions, it can be used for highly accurate cutting in industry.
Đáp án là D. As + clause = because : bởi vì, … => liên từ chỉ nguyên nhân, lý do,