— Mr Li looks often looks tired and worried? — So he does. You see it’s not easy to such a big factory.
Mary’s room is big ______ tidy, ______ Bob’s room isn’t tidy.
Please ______ Alice ______ 638-3265437.
Two and ________ is seven.
—______? — No, it’s on the sofa.
—Is this girl your sister? —Yes, _____ is.