1.Acutehearinghelpsmostanimalssensetheapproachofthunderstormslongbeforepeople.A.doB.hearC.dothemD.hearingit.2.Sherememberedseveraloccasionsinthepastshehadexperiencedasimilarfeeling.A.whichB.beforeC.thatD.when

Question

1.Acute hearing helps most animals sense the approach of thunder storms long before people____.
A.do B.hear C.do them D.hearing it.
2.She remembered several occasions in the past____she had experienced a similar feeling.
A.which B.before C.that D.when

Answer 1

1..表示时间长,即动物在人能察觉之前很长时间就能察觉的到.
2.这里是一个定语从句,其中occasions是先行词.教你一个很不错的办法,由于she had experienced a similar feeling.得句子成分已经很全,那么前面一般是做时间状语或地点状语,再根据先行词是时间还是地点选when 或者where.在这里是指时间,用when