I can't imagine this kind of situation who could keep calm!我想表达的意思是：我无法想象有谁能在这种情况下保持镇静!

I can't imagine this kind of situation who could keep calm!
我想表达的意思是：我无法想象有谁能在这种情况下保持镇静!

I can not imagine who can keep calm under this circumstances.