. When he was working there he caught a serious illness from efforts he still suffers.A.

问题补充：

. When he was working there he caught a serious illness from efforts he still suffers.

A. which

B. that

C. whose

D. what

答案：

A. which

B. that

(答案→)C. whose

D. what

解析：可联系答.案.网客服索取。