The scientific research on how to protect the rare animals is . Many scientists are workin

问题补充：

The scientific research on how to protect the rare animals is . Many scientists are working hard to find new way to raise the animals by man.

A. in danger

B. in control

C. in order

D. in progress

答案：

A. in danger

B. in control

C. in order

(答案→)D. in progress

解析：考查介词短语。in progress在进行中 in danger 处于危险之中 in order尽然有序 in control 在控制中根据意思，关于啊、保护稀有动物的科学研究正在进行之中。故选D。