Question

【题目】There are fewer and fewer tigers in India. The situation will continue ________ humans stop hunting them for their fur and bones.
A.unless
B.if
C.because
D.since

Answer 1

【答案】A
【解析】句意：在印度老虎越来越少。除非人类停止为获取皮毛和骨骼而猎杀它们，否则情况将继续恶化。A. unless除非，如果不；B. if如果；C. because因为；D. since自从。结合句意理解，答案为A。