⑴____ A. thing B. thirteen C. those D. thank
⑵____ A. short B. dollar C. answer D. color
⑶____ A. have B. take C. tape D. page
⑷____ A. how B. Brown C. know D. found
⑸____ A. eat B. health C. sweater D. breakfast
— _________ book?
— The one on your desk.
— It's Tom's
若分式 22x−1 有意义,则( )