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

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