Answer:
In the main idea or point used in an essay. It is usually made at the introductory paragraph where supporting paragraph are then used to support the statement. You know how we write topic sentence in a paragraph.. A thesis statement is almost the same but in an essay that statment if focused on throughout the whole essay.
Answer is A) This is the first time I have met you.
Answer:
If Michael could have taken the noon train, he would have been in time for the meeting this evening
Hope it helps