19..Someone is at the door, who is_________?

20.

Someone is at the door, who is ________?

1. A.
   this
2. B.
   that
3. C.
   it
4. D.
   he

. Someone is at the door, who is 　　　　　?

A.this　　　             B.that　　　          C.it　　　   D.he

.Someone is at the door, who is_________?

A. this　　　     B .that　　　       C. it　　　        D. He

19..Someone is at the door, who is_________?
20.