Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined bold word(s) in each of the following questions.
Question 20. The scientists are working on a drug capable of arresting the spread of cancerous cells.
A. catching B. grasping C. curbing D. seizing
Question 21. The best way to travel around London is to stand at the side of the road and hail a cab.
A. beckon B. call C. wave D. summon