Answer:
1. Sarah will finish her exams as soon as she will travel to London.
2. We will be able to visit the museum tomorrow.
3. Eating junk food is harmful for our health.
4. (e.g.) I can increase the amount of times that I workout every week.
Answer:
b, d, e, g
Explanation:
those all relate to her being a credible science author
Answer: The cars
Explanation: the subject is the thing you are talking about, which in this sentence is cars.