EXERCISE 1.3 1. These quick and easy can be effective in the short term, but they have a cost. A. solve B. solvable C. solutions D. solvability 2. He was looking at his parents , waiting for recommendations. A. obey B. obedience C. obedient D. obediently  3. The interviews with parents showed that the vast majority were of teachers. A. support B. supportive C. supporter D. supporting 4. It is of you to leave the medicine where the children could reach it. A. care B. caring C. careless D. careful 5. For reasons, passengers are requested not to leave any luggage unattended. A. secure B. securely C. security D. securing 6. The leader of the explorers had the great in his native guide. A. confident B. confidence C. confidential D. confidentially 7. We are impressed by his to help us with the hard mission. A. will B. willing C. willingness D. willingly 8. Although they are twins, they have almost the same appearance but they are seldom in A. agree B. agreeable C. agreement D. agreeably 9. The more and positive you look, the better you will feel. A. confide B. confident C. confidently D. confidence 10. It is reported that humans are the main reason for most species' declines and habitat and degradation are the leading threats. A. destroy B. destructive C. destructor D. destruction