39. She didn't used to bake a pie on the weekends.

The correct answer is A. used.

Explanation: The correct form of the phrase is "didn't use to" (not "didn't used to"). The auxiliary verb "didn't" already indicates the past tense, so "use" should be in its base form.

IV. WRITING

Part 2: Rearrange the words to make full-meaning sentences.

31. sequence/use/words/can//order of/to/show/our/We/the importance or/ideas.
Correct sentence: We can use words in sequence to show the importance or order of our ideas.

32. Vietnam/their/baseball/in/in/Children/dislike/playing/free time/
Correct sentence: Children in Vietnam dislike playing baseball in their free time.

33. a special/./words/note down/can review/notebook/them later/new/so I/I always/in
Correct sentence: I always note down new words in a special notebook so I can review them later.

34. too/our relatives/used to/We/far away//they/live/visit/but now/every summer,
Correct sentence: We used to visit our relatives every summer but now they live too far away.

Part 3: Rewrite the following sentence without changing its meaning. Use the given word(s) if any.

35. There is no air conditioner in my bedroom. (WISH)
Answer: I wish there were an air conditioner in my bedroom.

Explanation: The verb "were" is used in hypothetical wishes about the present.

36. My brother notes down new words to learn them later in his free time. (AS)
Answer: My brother notes down new words as he learns them later in his free time.

Explanation: The word "as" is used to indicate that one action happens while another is in progress.

37. It is important that we review the lessons several times before the test. (LOOK)
Answer: It is important that we look over the lessons several times before the test.

Explanation: "Look over" means to review or examine something.

38. In the past, my father always sketched in the backyard every weekend. (WOULD)
Answer: In the past, my father would always sketch in the backyard every weekend.

Explanation: "Would" is used to describe a habitual action in the past.