4. I saw a __ of cows in the field. A. group B. C. swarm D. flock Answer: # 5. The grapes are now __ enough to be picked. A. ready B. mature C. ripe D. advanced Answer: 333 6. Success in this examination depends __ hard work alone. A. at B. over C. for D. on

4. Answer: A<br />A **group** is a general term that can be used for a collection of animals, including cows. While other options refer to specific types of animal groups (flock for birds, swarm for insects), "group" is the most appropriate general term.<br /><br />5. Answer: C<br />**Ripe** specifically refers to the stage of maturity in fruits and vegetables when they are ready to be eaten. While "mature" means fully developed, it doesn't necessarily mean ready to eat.<br /><br />6. Answer: D<br />"Depends **on**" is the correct idiom. It indicates that success is contingent upon hard work.<br />