The girl_____ is standing under the tree is my sister. A. which B. where C. Who
--- What shall we do this Sunday? --- Why ______to the Science Museum?
Tell her ______the teacher and _______ the window.
-- Could I clean the room for you ? --- No, thank you. I ________it myself.
Mr. Yang teaches ______math and is very strict with us.
He has few friends and often feels lonely , _______he has much money.