답변을 얻은 뒤 반드시 감사의 덧글을 남기고, 좋은 답변은 채택해 주시는 센스...
질문할 때 예의를 지키시기 바랍니다.(빨리... 고수분만..... 이런 식의 요구는 자제 바랍니다.)
질문 내용 :

아래문제 답없는거야녀요?

-The farmer, who is poor, is very happy.
-The farmer, though he is poor, is very happy.

-Emilly called up Mr. Green, who was not in the office.
-Emilly called up Mr. Green buthe was not in the office.

-Mary saw a group of birds ,which flew across the lake.
- Mary saw a group of birds and it flew across the lake.

-This is my best friend,Lora, who lives next door to me.
-This is my best friend,Lora,and shelives next door to me.

-Jane bought a striped shirt,which she gave to her mom.
- Jane bought a striped shirt, andshe gave itto her mom.

어떤것이 어색한것인지 알고싶어요
..Mary saw a group of birds, which flew across the lake.를

Mary saw a group of birds, and they flew across the lake.여요?
Mary saw a group of birds, and it flew across the lake.이여요?
a group of birds를 다 받아서 and it 이라고 하면 틀려요?

a group of 복수명사를 다 받아서 it으로 받는 경우가 아예없나요?a group of 복수명사를 is나puts 처럼 동사쓸때있잖아용,,단수 취급하잖아용,,ㅠㅠ