1. Discuss common issues faced by people when using various transportation methods such as buses, trains, cars, or bicycles. 2. You can mention problems like delays, overcrowding, cost, safety concerns, and environmental impact.

1. 討論人們在使用各種交通工具時所面臨的常見問題，如公車、火車、汽車或自行車。 2. 您可以提及延誤、擁擠、成本、安全問題和環境影響等問題。