问题补充:
They urged that measures immediately to protect the endangered animals.
A. should take
B. must be taken
C. would take
D. be taken
答案:
A. should take
B. must be taken
C. would take
(答案→)D. be taken
解析:考查虚拟语气。动词urge敦促,从句用should + V原形,measures与take之间为被动关系,故选D。