题目

The boy began to pick up after a treatment of surgery, radiation and drugs. Which can replace the underlined word?       a. look up                  b. recover                c. mend                    d. turn up       A．all are correct                                     B．none are correct       C．all are correct except d                         D．none are correct but c唐朝时，十多批派遣使团到中国学习、交流的国家是A.伊朗 B.朝鲜C.越南 D.日本