1.The speech was so boring that I couldn't heip sleeping.
couldn't help doing..忍不住而做了某事
2.with--without
shy--outgoing
quiet--noisy
long--short
3.He was one of our school basketball players.
4.C.for wait for 固定词组
5.A.best 他最好的一部电影
best 前面有his,所以可以不＋the.