1．As ______ child, Salk did not show any interest in ______ medicine or science in general．
A．不填; 不填 B．the; 不填
C．a; 不填 D．a; the
2．The Yangtze River, China's longest, has been affected by a severe drought, _____ the lowest level of rainfall this year since 1961．
A．with B．for C．beyond D．besides
