Is ________ name Bob? Yes, I’m Bob.
Do you know the girl is drawing the pictures under the tree?—Yes . She is my new classmate.
This exercise is ________ difficult ________. [ ]
Who is that boy ______you ______Tom? [ ]
10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.
