Select the word or phrase that makes the following sentence grammatically correct: 'Why did we ____ try so hard?'

Correct Answer: D

Rationale: 'Have to' is the correct choice as it fits the sentence structure. The sentence is in the past tense ('did we') and requires the infinitive form 'have to' to express the idea of necessity or obligation in the past. 'Has to' (Choice A) is incorrect as it is present tense, 'haven't' (Choice B) is a negative form and does not make sense in this context, and 'had to' (Choice C) would imply a past obligation that has already been fulfilled, which is not the intended meaning here.

Correct Answer: A

Rationale: The correct answer is 'dog, who had.' The phrase 'dog, who had' correctly indicates that Janet called her dog to run after a squirrel. In this case, 'who had' provides additional information about the dog, making the sentence grammatically accurate. Choices B, C, and D are incorrect because they do not use the appropriate relative pronoun 'who' for referring to animals.

Correct Answer: C

Rationale: In the sentence 'The bird flew across the blue sky,' 'bird' is the noun. A noun is a word that represents a person, place, thing, or idea. In this sentence, 'bird' represents a living creature, making it the noun. 'Across' is a preposition used to show the relationship between 'flew' and 'sky.' 'Flew' is a verb indicating an action, and 'blue' is an adjective describing the sky.

Correct Answer: B

Rationale: In this context, 'good' is the appropriate word to describe Sharon's feelings about her speech. 'Good' is used to express a positive sentiment which fits well with how one would feel about the outcome of a speech. 'Well' typically refers to the state of health or being done in a good way, not emotions. 'Finely' refers to something done very carefully or skillfully, not an emotional state. 'Happily' denotes a feeling of joy or pleasure, which may not be the most suitable term for describing her feelings about the speech outcome.

Correct Answer: A

Rationale: In this sentence, 'lie' is the correct word for the patient wanting to recline on the bed, and 'lay' is the correct word for placing the tray of food on the table. Therefore, 'lie, lay' is the proper sequence of words for the actions described in the sentence. Choice B is incorrect because 'lie' should be used for reclining, not 'lay'. Choice C is incorrect as 'laid' is the past tense of 'lay,' not the present tense. Choice D is incorrect; 'lain' is the past participle of 'lie,' not the present tense.

Correct Answer: A

Rationale: The correct answer is 'amount.' In this context, 'amount' is used to describe the intensity or level of pain, which is an uncountable noun. 'Frequency' (B) refers to how often something occurs, 'number' (C) is used for countable objects, and 'amplitude' (D) is typically used in the context of sound or waves, not pain.

Correct Answer: A

Rationale: The correct answer is 'Is.' In this sentence, the subject 'picking up groceries' is singular, so it should be followed by the singular form of the verb 'to be,' which is 'is.' The verb should agree with the subject in number. 'Am' is incorrect as it is the first person singular form, 'Is it' creates an unnecessary question structure, and 'Are' is plural, not matching the singular subject. Therefore, 'Is' is needed to make the sentence grammatically correct.

Correct Answer: B

Rationale: The correct word that should replace 'among' in the sentence is 'between' when referring to a distinction between two things. 'Among' is used when referring to more than two items or when the items are part of a group. In this context, 'between' is more appropriate as there are only two treatment protocols being compared.

Correct Answer: B

Rationale: 'Badly' is the correct adverb to modify 'danced'. In this context, 'badly' is used to describe the manner in which the student danced, indicating that her dancing performance was not good, contrasting with her singing ability. 'Poorly' (choice C) is also an adverb, but 'badly' is more commonly used in this context to describe performance in an artistic or skill-based activity. Choice D, 'poorer,' is incorrect as it is the comparative form of 'poor,' not the appropriate adverb to describe how she danced.