How happy they look!=What...
how happy they look 还是how happily they look
What did they look?=How did they like?还是=How did they look?
They are singing----------.How ------they look.happy.happily
Look at these c_____ ,how happy they are.
是how happy they are 还是 what happy they are 为什么
How () happy they are!
How happy the boy (look)!
Look!How happy your mother___(look)
Look at the photo of the Smiths.----happy they are!A.How B.H
Look at the photo of the Smiths.----happy they are!A.How B.W
how happy they are playing!
( )--------- a happy life they live!A.How B.What C.Where