:|1_0u'p'M)T1Y,[(v7o6H It’s impossible for a child to do so much work within a short period of time，_________?'m,?3U,F:N+?8P6d7@1Q*E(z'H5P5`
A.isn’t it'm,?3U,F:N+?8P6d7@1Q*E(z'H5P5`
B.is it'm,?3U,F:N+?8P6d7@1Q*E(z'H5P5`
C.has it'm,?3U,F:N+?8P6d7@1Q*E(z'H5P5`
D.hasn’t it'm,?3U,F:N+?8P6d7@1Q*E(z'H5P5`