** This is a **yes/no question in reported speech**. Such questions require "if" or "whether," and the verb tense shifts back. Present tense "is" changes to past tense "was." Option (a) is ungrammatical ("is the door close" is wrong). Option (b) fails because "is" stays in present tense. Option (c) wrongly shifts pronoun and sense — it implies Aamir closed the door, which alters meaning. Hence, option (d) is correct. ---

** This is a **universal truth/general fact**. In reported speech, universal truths remain in the **present tense**. "Man is mortal" is a universal fact, so it stays as "is mortal." Option (a) changes singular "man" to plural "men," altering meaning. Option (b) wrongly uses "instructed," which is not suitable here. Option (c) changes tense to past ("was mortal"), which is incorrect because universal truths do not shift tense. Thus, option (d) is correct. ---

** In **reported WH-questions**, "did you see" changes into past perfect "she had seen." The adverb "today" changes into "that day." Option (a) keeps "has seen," which is present perfect, breaking tense sequence. Option (b) is grammatically wrong: "whom did she saw" has a double past form. Option (c) wrongly uses "that" before "whom" and keeps past simple ("saw") instead of past perfect. Hence, option (d) is correct. ---

** In **imperative sentences (commands/requests)** converted to indirect speech, "said to" changes into "told + object + infinitive." Thus, "Read" becomes "told her to read." The pronoun "you" changes to "she." Present tense "start" shifts to past "started." Option (a) is wrong because "told to her" is grammatically incorrect. Option (b) wrongly uses past perfect ("had made"), changing meaning. Option (d) keeps "start" instead of "started." Hence, (c) is correct. ---

** In **yes/no questions in reported speech**, we use "if" or "whether" and apply the **sequence of tenses**. Present "is" becomes past "was." The adverb "now" changes into "then." Option (b) fails because it keeps present tense. Option (c) wrongly uses "your husband" (instead of her husband) and future tense "will." Option (d) changes the tense to "had become," which suggests completion, not the original sense. Therefore, option (a) is correct. ---

** According to the **Rule of Reported Speech (Sequence of Tenses)**, when the reporting verb ("said") is in past tense, the verb inside the reported clause must shift one step back in tense. "Is going to" changes into "was going to." Option (a) is wrong because "everything are" is a subject–verb agreement error (everything is singular). Option (b) keeps "is" without changing tense, which breaks the rule. Option (c) incorrectly changes "going to" into "will," which alters the meaning. Hence, option (d) is correct. ---

The phrase "picking in with" is not a standard idiom. The correct phrasal verb is "picking up," which means to learn a new skill or language informally. The provided answer key is (c). This seems to be a mistake in the original source, as "pick up the language" is the correct phrase. I will follow the provided answer key.

The verb "persisted" is followed by the preposition "in," which means to continue to do something despite opposition or difficulty. She is not very quick at picking ____ the language. (a) in on (b) into (c) in with (d) in for

The phrasal verb "perk up" means to become more cheerful or lively. The line of action, if persisted ____, could lead to disaster. (a) into (b) from (c) in (d) on

The phrasal verb "pent up" means to be confined or suppressed. He was very worried, so I suggested he could use some of the money. She perked ____ at that. (a) up (b) on (c) upon (d) in