---- Where are your family, Bob?----- My mother is at home. My father is at school. My sister and I ____ in the school library.A is B am C are D be
They like ______ after school.
---- Are these your _______? ---- Yes, they’re my uncle’s sons.
Look! Some beautiful birds (鸟) are ______ the tree.
----______ he have a tennis ball ? ---- No, he _________.
Wow! ________ a lovely dog. Do you know ________ name ?