Question

Scientists think that the continents always where they ________ today.

A. aren't; are
B. aren't; were
C. weren't; are
D. weren't; were

Answer 1

答案C
解析：本句的句意为“科学家们认为，大陆并不总是像它们今天所在的位置．”大陆原来的位置、应该用一般过去时来表达，而大陆今天的情况，应用一般现在时来表达．
命题立意：本题看重考查时态．在语境中考查考生对时态的理解与运用．解该题的关键是：一要分析清楚句子的组成结构，二要理解本句的语意．where引导的句子在整个句子中作表语，这一点对整句语意的理解非常重要．