题目内容:
Many people believe we are heading for an environmental disaster (灾难) ______ we radically (根本地) change the way we live.
A. but B. though C. unless D. in case
参考答案:
答案解析:
Many people believe we are heading for an environmental disaster (灾难) ______ we radically (根本地) change the way we live.
A. but B. though C. unless D. in case