A:Since
B:While
C:Once
D:A
18的 13 是____ ;12的 34 是____ 。
A.3 B.6 C.9 D.12
(____) They're on Shelf A.
(____) Well, let me help you.
(____) But I can't find the book.
(____) Where are the books about sports, please?
(____) Do you know the name of the book?