—I heard they went skiing in the mountains last winter. —It true because there was little

问题补充：

—I heard they went skiing in the mountains last winter.

—It true because there was little snow there.

A. may be not

B. won’t be

C. couldn’t be

D. mustn’t be

答案：

A. may be not

B. won’t be

(答案→)C. couldn’t be

D. mustn’t be

解析：句意：我听说他们去年冬天去山里滑雪。--不可能是真的，因为那里很少有雪。根据because there was little snow there.可知这里是否定推测，couldn’t be“不可能是”，A. may be not可能不，B. won’t be 不会， D. mustn’t be禁止，所以选C。