---Is this book Betty's? ----Yes , it's ________.
—Is the girl in red Jim’s sister? —____
Please help Jack ____ his bike. It’s missing(不见了).
—I’ll help you find him, Mary. —____
My dress ____ blue ____ yours. I like (喜欢) its (它的) color, but it is too short.
—Are the black shoes ____? —No. It’s ____.