1. I used to listen to pop. Now I perfer (classical / classic) music.

2. Those tiny cars are very (economic / economical) to run.

3. It's a long course, but if you stick with it you'll (eventually / ppossibly) get a really valuable qualification. So it's worth it.

4. The main thing with this filing job is to be (effective / efficient) Get the system right and don't waste time.

5. This is an (historic / historical) victory for the Hungarian men's badminton team in their first international competition.

어떤 것이 맞는 단어 일까요?