Answer:

1. During my time in the city, I carried out a survey to gather data about people's eating habits.

- Carried out = conducted: đã tiến hành

- QKĐ: S + Ved/pp + O

- During + N

- S + am/is/are + Ving + O

2. I decided to cut down on fast food and start cooking my own meals

- Decided to do sth: quyết định làm điều gì đó

- Cut down on = reduce: cắt giảm, giảm bớt

- S1 + decided + to + V-inf + that + S2 + V

3. With the efficient public transportation system, it was easy to get around from place to place in the city

- Get around from = move from: di chuyển từ...

- Efficient public transportation: giao thông công cộng hiệu quả

- QKĐ: S + was/were + adj + to V-inf

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