1.The boy is my cousin.He is wearing a new sweater.

1.The boy is my cousin who/that is wearing a new sweater.
2.I used to keep a cat which/that was friendly and lovely.
3.The dog is mine which/that is running.
4.Our English teacher is talking with the girl who/that didn't pass the exam
5.Dad bought the blue bicycle.that/which was the most expensive one.
无疑后请采纳.
书山有路勤为径,学海无涯苦作舟.
-----------与君共勉-----------

1.The boy is my cousion wearing ..
2.i useed to keep a cat andwas ....
3.the og is mine andrunoing
4............butdid.....
5......................was........

1.The boy who is wearing a new sweater is my cousin .
2.I used to keep a cat which / that was friendly and lovely.
3.The dog which / that is running is mine.
4.Our English teacher is talking with the girl who didn't pass the exam
5.Dad bought the blue bicycle which / that was the most expensive one.

The boy is my cousin who is wearing a new sweater.
I used to keep a cat which was friendly and lovely.
The dog which is running is mine.
Our English teacher is talking with the girl who didn't pass the exam.
Dad bought the blue bicycle which was the most expensive one.

1、The boy who is wearing a new sweater is my cousin。
2、.I used to keep a cat which was friendly and lovely.
3、The dog is running is mine 。
4、Our English teacher is talking with the girl who didn't pass the exam
5、Dad bought the blue bicycle which was the most expensive one

1.The boy that/who is wearing a new sweater is my cousin.
2.I used to keep a cat that/which was friendly and lovely.
3.The dog which/that is running is mine.
4.Our English teacher is talki...