Question 90: The doctors hope to                            the source of the infection which has been a mystery for the medical community since its discovery.

A. trend down                   B. back down                    C. push down                   D. track down

Question 91: No one won the match; the final result was a(n)                            .

A. draw                             B. equal                             C. score                             D. drawing

210 CÂU TỪ VỰNG TỪ ĐỀ CÔ DƯƠNG THỊ HƯƠNG