Part 1: 11. B. battery

1. C. weight

Part 2: 13. A. screen

1. B. are
2. C. technology
3. B. more slowly
4. C. recognize
5. D. was walking/ appeared

Part 3: 19. I was driving my car very fast when you called me.

1. I'm afraid I won't be able to come for the meeting tomorrow.

Part 4: Unfortunately, there seems to be a mistake in the provided passage for Part 1 of the Reading section. It only includes an email header and lacks the passage itself. Therefore, I cannot provide accurate answers for this part.