Correct Answer: A

Rationale: In the context provided, the correct answer is 'university.' The term 'university' is used to refer to higher education institutions that offer undergraduate and postgraduate degrees. While 'academy,' 'college,' and 'institute' are also types of educational institutions, 'university' is the most fitting choice here as it best aligns with the idea of completing higher education before joining the army.

Correct Answer: C

Rationale: Consistency refers to the quality of staying the same in behavior or level. Thickness is a synonym for consistency as it implies a state of being dense, compact, or solid throughout, which aligns with the idea of staying the same. Conversely, appearance, volatility, and color do not directly relate to the concept of consistency. 'Appearance' refers to how something looks, 'volatility' refers to how easily something changes, and 'color' refers to the hue or shade of something, none of which capture the essence of consistency.

Correct Answer: B

Rationale: The correct answer is 'B: had known.' In this conditional sentence, the past perfect tense is required to indicate that knowing about the weather should have happened before going to the beach. 'Knew' (choice A and C) is in the simple past tense, which doesn't convey the sequence of events accurately. 'Could have known' (choice D) is incorrect as it implies a possibility of knowing in the past, but it doesn't fit the context of the sentence where the emphasis is on prior knowledge before going to the beach.

Correct Answer: B

Rationale: The correct answer is B: 'To expel feces.' Defecate refers to the act of eliminating solid waste from the body. Choice A, 'To retain feces,' is incorrect as defecation involves getting rid of feces. Choices C and D, 'To eliminate fluid' and 'To excrete mucus,' are also incorrect as they do not accurately define the term 'defecate.'

Correct Answer: B

Rationale: Exogenous means produced outside the body. In this context, 'within the body' (Choice A), 'a byproduct' (Choice C), and 'caused by bacteria' (Choice D) do not accurately define exogenous. The correct definition of exogenous specifically refers to something originating or produced externally.