The American boy is only four years old. He can swim the lake.A. overB. alongC. acrossD. p

问题补充：

The American boy is only four years old. He can swim the lake.

A. over

B. along

C. across

D. past

答案：

A. over

B. along

(答案→)C. across

D. past

解析：句意：那个美国男孩仅仅4岁，他能游过那个湖。A. over在上方； B. along沿着；C. across横穿； D. past经过。根据句意这里指的是横着游过这个湖。故选C。