-What's David's dog doing?-（ ）is singing.A.She B.He C.It.要理由

-What's David's dog doing?-（ ）is singing.A.She B.He C.It.要理由 she is a singer.she is good at （） A\singing B\to singing C\s What's this?___ A This is a dog B That's C It's a dog D I'm （ ）is singing to the baby.A,She B,Her C,She's D,Her's What's his name?A.It's Eric.B.He's Eric.C.She what's David doing?——He is b with his homework.后面加什么? 1.—What color is the dog?—It's( ) A.white dog B.a white C.wh What's Tom's father doing?____ a,she' reading b,He's reading 1 What ( ) your father ( He's cooking A does.do B is.doing C It's important to___what he is doing.A.find B.find out C.loo what's the girl ______?She's riding a bike.A.do B.doing C.do ___kate .she's english.a、 it's b 、it c 、its d 、he's