The girl can't be Mary, for she _____. [ ]

A. has been to London 

B. has gone to Paris

C. was going to London

D. had gone to Paris

砌块墙是采用砌块砌筑而成的墙体，具有生产效率高、热工性能好、减少环境污染等特点但是增大了墙体自重。