The boy is only four years old but he can swim the lake.A. alongB. overC. acrossD. throu

问题补充：

The boy is only four years old, but he can swim the lake.

A. along

B. over

C. across

D. through

答案：

A. along

B. over

(答案→)C. across

D. through

解析：句意：那个男孩4岁了，但是他会游过那个湖。A. along表示“沿着”，通常用于狭长的东西。B. over 在……上方；C. across主要表示从某物的表面“横过”，涉及“面”的概念；D. through表示从某个空间“穿过”，涉及“体”的概念。根据句意故选C。