57.Bill was doing a lot of physical exercise to build up his _____.
A.ability B.force C.strength D.mind
58.The plane must be ready within half an hour.These should be no ___ in sending the blood and medicine to the injured people.
A.hurry B.delay C.time D.wait
57.答案是C，句意:比尔正在做大量的运动，目的是增强他的体力。Strength 体力，力气。
58.答案是B,句意:送血和药物给受伤的人不能耽搁。Delay 耽搁。
