Đề bài: Write the comparative forms of the adjective/adverbs in the bracket ( và giải thích tại sao điền như vậy)

1. The countryside is (crowded) ..... and (tranquil) ..... than cities.

2. I guess that ploughing machine can plough very much (fast) ..... than a buffalo.

3. Good healthcare service can be (easy) ..... found in rural areas than in cities.

4. Farmers often have to get up (early) .... than city dwellers.