With the strong economy and unemployment down, beautiful housing ________ to meet demand.[ ]

A. has build  

B. is being built

C. is building  

D. was built

脉络膜黑色素瘤，临床表现为

A．眼底可见褐色棕黄色隆起的肿物
B．以上全对
C．肿物顶部可见视网膜血管扩张、充血
D．FFA、MRI、B超等检查有助本病诊断
E．视力下降，视野缺损，眼前飘浮物