They saw the math teacher ______ the classroom just now.
----Hi,Tony! What are you doing? ---- I’m sending ______ e-mail ______ my grandfather.
—Are you good at________English? —No, I’m good________my teachers.
—______do you like pandas? — ______they are cute.
I have _____rules in my home. We have_____ homework to do today.
Lily, ______ the window.