Выберите прилагательное в подходящей ступени сравнения. Перепишите и переведите

Изберите прилагательное в подходящей ступени сопоставления. Перепишите и переведите предложения на российский язык.
1. Last night I went to bed (early, earlier, the earliest) than usual.
2. The speed of this plane is as (high, higher, the highest) as the speed of sound.
3. The film was very bad. I think its (bad, worse, the worst) film Ive ever seen.
4. Is it (expensive, more expensive, the most expensive) to go by car or by train?