1. Thanks to the modern _______ （运输） system, a large number of passengers could return home for the seven-day National Day holiday.
2. Many people prefer _______ （骑自行车） to driving to the work site.
3. The tight _______（日程表） often keeps him busy all the time.
4. He is as ________ （固执的） as a donkey.
5. What’s your ________ （态度） towards this problem?
