Question 11: It is vital that people allow to choose where to live. Question 12: She requested that everyone in my class attends her presentation. Question 13: It is crucial that urban people don’t l...

Answer 11: It is vital that people be allowed to choose where to live. Explanation: The verb "allow" requires the base form of the verb after it, so it should be "be allowed" instead of "allow." Answer 12: She requested that everyone in my class attend her presentation. Explanation: When using the verb "request" in the present tense, the following verb should be in the base form without an "s" at the end. Answer 13: It is crucial that urban people not look down on rural people. Explanation: When expressing a negative statement in a subjunctive mood, we use "not" before the base form of the verb. Answer 14: Her parents insisted that she study hard for GCSE. Explanation: When using the verb "insist" in the present tense, the following verb should be in the base form without an "s" at the end. Answer 15: The doctor suggested that his patient not stop smoking. Explanation: When expressing a negative statement in a subjunctive mood, we use "not" before the base form of the verb. Answer 16: This train is very slow. The earlier train was much faster. I wish I could catch the earlier train. Explanation: In this case, we use the modal verb "could" to express a hypothetical or unreal situation in the past.