Hisdogischainedinthedaytimebutis______atnightA

His dog is chained in the day time，but is ______at night.

A. at large

B. so large

C. very large

D. in large

正确答案：A
[解析]atlarge为固定用法意为自由的未被捕未缚住的此句意为他的狗白天被拴着但一到晚上便放开了故选A