A. purpose __ D. design 27: "What are you going to do next?" "I wish I __ the answer to that question." B. Jdea C. Intention A. knew B. had known D. will know 28: There was __ evidence to bring charges against the man. C. would know A. Insubstantial 29: What a __ I A. new small nice car B. Interior C. ineffective D. Insufficient B. nice small new car D. car new nice and small 30: His parents hostile attitude __ him to leave home C. new nice car that is small A. drove B. urged C. made D. suggested 31:. I recommend that the student __ his composition as soon as possible. D. finished writing A. finishes writing B. should finish the writing C. finish writing 32: Hearing-aid devices are very helpful for __ are hard of hearing. B. those who D. who 33: We should study hard __ our parents can be proud of us. C. people A. so as to B. in order that C. as that D. in order to A. have finished __ my assignment, I'll show you how to solve that problem B. will finish C. will have finished D. finished 35: Today many countries are trying to develop __ energy sources. D. non-renewable A. sustainable B. natural C. damaging 36: The company managed to __ its best workers and kept its rival from stealing them. B. employ A. promote C. retain D. consider 37:The __ of food during that long winter left many families in despair. A. scarcity B. availability C. variety D. abundance 38: You __ smoke in here. It's against the rules. A. shouldn't B. mightn't C. mustn't D. needn't 39: The new director is favorably __ towards innovations. A.disposed B. devoted C. dedicated D. discouraged 10: These teachers __ to help their students understand simple things.

Here are the answers and explanations for the questions you provided:<br /><br />**27: A. knew**<br /><br />* **Explanation:** The sentence is in the past tense, and the speaker is expressing regret about not knowing the answer. "Knew" is the past tense of "know" and fits the context.<br /><br />**28: D. Insufficient**<br /><br />* **Explanation:** "Insufficient" means not enough, which makes sense in the context of evidence being inadequate to bring charges.<br /><br />**29: B. nice small new car**<br /><br />* **Explanation:** The correct order for adjectives describing a noun is usually: opinion (nice), size (small), age (new), and then the noun (car).<br /><br />**30: A. drove**<br /><br />* **Explanation:** "Drove" means to force or compel someone to do something. It fits the context of the parents' hostile attitude causing the person to leave home.<br /><br />**31: C. finish writing**<br /><br />* **Explanation:** The sentence uses the subjunctive mood after "recommend that." The subjunctive mood uses the base form of the verb (finish) without any auxiliary verbs.<br /><br />**32: B. those who**<br /><br />* **Explanation:** "Those who" is a relative pronoun phrase that refers to people who are hard of hearing.<br /><br />**33: D. in order to**<br /><br />* **Explanation:** "In order to" is used to express purpose. The sentence means that we should study hard so that our parents can be proud of us.<br /><br />**34: C. will have finished**<br /><br />* **Explanation:** "Will have finished" is the future perfect tense, which is used to describe an action that will be completed before a specific time in the future. <br /><br />**35: A. sustainable**<br /><br />* **Explanation:** Sustainable energy sources are those that can be replenished naturally and are environmentally friendly.<br /><br />**36: C. retain**<br /><br />* **Explanation:** "Retain" means to keep or hold onto something. In this context, the company is trying to keep its best workers.<br /><br />**37: A. scarcity**<br /><br />* **Explanation:** "Scarcity" means a lack of something, which fits the context of food being in short supply during the winter.<br /><br />**38: C. mustn't**<br /><br />* **Explanation:** "Mustn't" is used to express a strong prohibition. It means that smoking is not allowed in this place.<br /><br />**39: A. disposed**<br /><br />* **Explanation:** "Disposed" means inclined or willing to do something. In this context, the director is favorably inclined towards innovations.<br /><br />**40: A. are eager**<br /><br />* **Explanation:** "Are eager" means to be enthusiastic or willing to do something. It fits the context of the teachers being enthusiastic about helping their students. <br />