Question

高一英语改错，求讲解，谢谢

Answer 1

1.B--at dusk
2.B--nature
3.C--discovered her
4.B--a series of facts
5.C--had seen /或者: A--is

追问

原因

追答

1.at dusk 固定短语,"在黄昏"
2.nature前不用冠词
3.discover为及物动词,后面必须带宾语,her指代Anne.
4.a series of 一系列的(事实),因此fact要用复数形式facts.
5.这/那是某人第几次做某事:It is/was the + 序数词+that sb. have/had done sth.
当前面用is时,that从句就用现完:have/has done
当前面用was时,that从句就用过完:had done
所以有两种改法.

Answer 2

1.B.at dusk2.C.the dirty...3.B.facts4.A.is