--- What ________ useful book ! ---Yes, it is. But I found___________ difficult for me to read.

_Who is _____ English teacher, Lu Yu? _  Mr Tian teaches _______ English.

There are two dogs in my family. One is white,_____________ black. 

My mother is Alice Johnson. ________ phone number is 2546809. 

 -- Lily, is this ___ ipad?    --No, it's not mine. I think it's Lucy's.