A. L/C<D/P<D/A B. L/C<D/A<D/P C. D/A<D/P</C D/P<D/A<L/C
A. D/P at sight B. D/P after at sight C. D/A after at sight D. L/C
A. 前T/T B. 后T/T C. L/C D/A