在26个字母中 ___ 和 ____ 可以单独成词。A.R;E B.O;U C.A;I
—Is this ______ pencil? —No, it’s not ______.
—.Where are the baseballs? —They are _______.
Mary’s room is big ______ tidy, ______ Bob’s room isn’t tidy.
Please ______ Alice ______ 638-3265437.
Two and ________ is seven.