Our professor told us that salt water at a lower temperature than fresh water.
A. is freezing
B. was frozen
C. freezes
D. froze
网友回答
A. is freezing
B. was frozen
(答案→)C. freezes
D. froze
解析：考查时态，句意：我们的教授告诉我们盐水和淡水相比在非常低的温度下会结冰。根据语境，这是一种自然现象，所以应用一般现在时态。选C。