Answer:
16. (d) by 2025.
17. (b) through.
18. (c) off.
19. (d) in the form.
20. (a) from experience.
Step-by-step explanation:
16. The preposition 'by' is used here to refer to a specific point in time (year 2025).
17. 'Through' is the correct preposition to use with 'ran' when referring to moving with effort or force within a space.
18. 'Off' is used in the phrase 'put off', which means to delay or postpone something. In this case, it's about delaying what you can do today until tomorrow.
19. When you're asked to 'fill in' something, it usually means to write or type information in the spaces on a form.
20. When someone speaks 'from' experience, it means they are using their past experiences as a source of knowledge or advice.
Hope this helps! :)