I believe the thesis in this is actually the first sentence considering the rest of the story talks about that first sentence.
Answer:
He got a lawn mowing service, flowers, and checked the weather.
Answer:
I think its great. But make a happy song, not a depressing one.
Answer:
D) Fixing
Explanation:
The sentence explains that the student could only travel by foot. But why? It is because the bike was being fixed. Now, if we replace fixing with fixed, the sentence becomes "I had to go to school on foot last week because my bike was being fixed." That makes a lot more sense! Hope this helps!