用所给词的适当形式填空
【小题1】The instructions on the bottle are really ________(confuse), which I can't understand at all.
【小题2】David would succeed along the career ladder one day, I ________ (firm) believe, if he should devote more energy to his work.
【小题3】Why do you turn off the light in the room? We are in total ________(dark) now and can’t see anything.
【小题4】He turned the corner a little fast, ________(narrow) hitting the boy who ran into the road to wave him down.
【小题5】He agreed to build a pub near the supermarket without ________ (hesitate).
【小题6】As is well known, laughing can help ________(relief) stress.
【小题7】Traffic jams, bad housing and too little grass are the main ________ (anxious) of people who live in urban areas.
【小题8】At the meeting, they discussed three different ________ (approach) to the study of mathematics.