Identify the function of the suffix and choose the correct word/phrase for each sentence.

Here are the answers to your English questions: 21. The suffix '-ly' usually forms adverbs from adjectives. C) makes adverb 22. The suffix '-er' is used to form comparative adjectives (e.g., taller, faster). A) -er 23. The suffixes '-ness', '-ion', and '-tion/-sion' are used to form nouns. '-es' is typically a plural marker for nouns, not a suffix that forms a noun from another word class. C) -es 24. "Should" is used to give advice or make a recommendation. D) should 25. "Mustn't" expresses a strong prohibition or a rule that must not be broken. B) mustn't 26. "Don't have to" indicates that something is not necessary. Since the deadline is extended, rushing is not necessary. B) don't have to 27. "Must" expresses a strong obligation or necessity. A) must 28. "Should" is used to express a recommendation or what is advisable to achieve a goal. B) should 29. "Ought to" expresses a moral obligation or a strong recommendation, similar to "should" but often with a stronger sense of duty. B) ought to 30. Options A and B are identical and grammatically correct. "Which" is used to refer to things. A) The book which I borrowed from the library is very interesting. 31. "Whose" is used to show possession (the students belong to the teacher). C) whose 32. "Where" is used to refer to a place. C) where 33. "Whom" is the object of the verb "consulted" (I consulted him). D) whom 34. "Who" is the subject of the verb "teaches". A) who 35. "Where" refers to the place (the vehicle) where the gun was found. B) where the gun was found 36. "To whom" is correct because "whom" is the object of the preposition "to". B) to whom 37. The present perfect tense ("has lost") is used for an action that happened in the past but has a result relevant to the present (she can't find them now). B) has lost 38. "Yet" is commonly used with the present perfect tense in negative sentences to indicate that something has not happened up to the present moment. A) haven't eaten 39. "For" is used to specify a duration of time. C) for 3 done, 2 left today. You're making progress.