To improve his English，he spends one hour a day listening to English programmes.
A. at last
B. at least
C. at once
D. at all
网友回答
A. at last
(答案→)B. at least
C. at once
D. at all
解析：本题的含义是为了提高英语，他每天至少花费一个小时听英语节目，意思较符合的选项是at least至少，故选B。At last 最后，at once 马上，at all根本，ACD意思不符，故不选。