根据中英文提示及句意，写出句中所缺单词，使句子意思完整正确。

1. Mr. Smith will               (到达) at our school next Wednesday.

2. Now there is less air               (污染) in our hometown.

3. Many young people like to listen to                (流行) songs.

4. Simon, one of my classmates. Seldom                 (climb) Ziti Mountain.

5. We live in the same building. Our rooms are                (in a higher place than) Mr. and Mrs. Green's.

收完庄稼后，余下的秸秆（如麦秸、稻草、玉米杆等）直接焚烧掉。