Choose the correct answer that complete th...

Câu hỏi: Choose the correct answer that complete these given words.

A. He still suffers from a rare tropical disease which contracted while he was in Africa

B. He still suffers from a rare tropical disease which he contracted while he was in Africa

C. He suffers from a rare tropical disease which he contracts while in Africa

D. He suffers from a rare tropical disease which was contracted while he is in Africa