求助英语语法题They were the Boy Scouts _________ to help elderly pe

求助英语语法题
They were the Boy Scouts _________ to help elderly people cross the street.
A.whose was the task B.whose the task was
C.whose task it was D.whose task was it
9.Usually adaptations are an advantage,but sometimes an organism（生物体）is so well adapted to a particular environment __________ conditions change,it finds it difficult or impossible to readapt to the new conditions.
A.if B.that C.that if D.if that
10.I couldn’t do my homework with all that noise _________.
A.going on B.gone on C.went on D.to go on
11.It was _________ he was in critical condition _________ the doctors decided to operate on him.
A.as…when B.that…that C.because…that D./…where
12._________,lack of clean fresh water presents an even greater threat.
A.As bad as the air can be B.The air can be as bad
C.Bad as the air can be D.As the air can be bad
13.Differences in American schools __________ those found in most other countries lie in the fact education there has long been intended for everyone.
A.comparing with B.compared with
C.to compare with D.are compared with
Insects can live in places that are too small for other animal,and _________ they can also find food and protection from enemies.
A.that B./ C.where D.as
She looks forward,__________,to the completion of the building.
A.as her colleagues B.her colleagues do as
C.as do her colleagues D.do as her colleagues

C,9C,10A,11C,12C,13B,C,C
C
They were the Boy Scouts __whose task it was__ to help elderly people cross the street.A.whose was the task B.whose the task was C.whose task it was D.whose task was it
9 C
9.Usually adaptations are an advantage,but sometimes an organism（生物体）is so well adapted to a particular environment ___ that if _____ conditions change,it finds it difficult or impossible to readapt to the new conditions.A.if B.that C.that if D.if that
10 A
10.I couldn’t do my homework with all that noise ___ going on ______.A.going on B.gone on C.went on D.to go on
11 C
11.It was ___ because ____ he was in critical condition ___ that ___ the doctors decided to operate on him.A.as…when B.that…that C.because…that D./…where
12 C
12.__ Bad as the air can be ____,lack of clean fresh water presents an even greater threat.A.As bad as the air can be B.The air can be as bad C.Bad as the air can be D.As the air can be bad
13 B
13.Differences in American schools __ compared with _____ those found in most other countries lie in the fact education there has long been intended for everyone.A.comparing with B.compared with C.to compare with D.are compared with
C
Insects can live in places that are too small for other animal,and __ where ___ they can also find food and protection from enemies.A.that B./ C.where D.as
C
She looks forward,_ as do her colleagues ___,to the completion of the building.A.as her colleagues B.her colleagues do as C.as do her colleagues D.do as her colleagues