1. The-water is __ .You can't drink it. A. polluted B. pollution C. polluting D. pollutant __ ) in the news. D. interests A. interested B. interesting 3. Many spacemen could never get back to the Earth because of __ accidents. A. tragedy B. tragic C. tragically D. tragedies 4. They have no (for help. D. expectancy A. expectation B. expect C. expectative 5. Boys and girls may behave __ in this situation. C. different D. differently A. difference B. differing 6. All of __ that he was successful in the final exam. D. surprised A. surprising B. surprisingly C. surprise 7. One recent __ in medicine is the development of laser in treating cancer. D. achieved A. achievements B. achievement C. achiever 8. You have to be aware of the damage humans are doing to quicken the __ of wildlife. A. extinct B. extinctive C. extinctions D. extinction 9. He was fin.(ily __ in his final attempt. C. unsuccessful D. success A successful B. successive 0. They did everything possible to __ the police force C. strength D. stronger A. strengthen B. strengthening 1. I spent an __ night because of my toothache. I'm very tired now. D. asleep A sleepy B. sleeping C. sleepless His fow scores in the mock tests him quite a lot. __ C. discouraged D. encouragement B. encouraging The waste from the chemical factory is extremely __ D. harmless A harmed B. unharmed C. Harmful

1. **A. polluted** The sentence requires an adjective to describe the water. "Polluted" means contaminated and unfit for drinking.<br /><br />2. **B. interesting** The sentence needs an adjective to describe the news. "Interesting" means captivating or engaging.<br /><br />3. **D. tragedies** The sentence needs a plural noun to refer to multiple accidents. "Tragedies" refers to disastrous events.<br /><br />4. **A. expectation** The phrase requires a noun. "Expectation" means a belief that something will happen. The sentence implies a lack of hope for help.<br /><br />5. **D. differently** The sentence needs an adverb to modify the verb "behave." "Differently" means in a different way.<br /><br />6. **C. surprise** The sentence needs a noun as the object of the preposition "of." "Surprise" refers to the feeling of unexpectedness. The sentence structure implies that the fact of his success was a surprise.<br /><br />7. **B. achievement** The sentence needs a singular noun. "Achievement" refers to a successful accomplishment.<br /><br />8. **D. extinction** The sentence needs a noun. "Extinction" refers to the state of a species ceasing to exist.<br /><br />9. **A. successful** The sentence needs an adjective to describe his attempt. "Successful" means having achieved a desired outcome.<br /><br />10. **A. strengthen** The sentence needs a verb. "Strengthen" means to make stronger.<br /><br />11. **C. sleepless** The sentence needs an adjective to describe the night. "Sleepless" means without sleep.<br /><br />12. **C. discouraged** The sentence needs a verb in the past tense. "Discouraged" means to lose confidence or enthusiasm.<br /><br />13. **C. harmful** The sentence needs an adjective to describe the waste. "Harmful" means causing or capable of causing harm.<br />