I get up six the morning every day but Sunday morning I get up a little later.A. at i

问题补充：

I get up six the morning every day, but Sunday morning I get up a little later.

A. at, in, on

B. at, in, in

C. at, on, on

D. in, on, at

答案：

(答案→)A. at, in, on

B. at, in, in

C. at, on, on

D. in, on, at

解析：句意：我每天早上6点起床。但是，在星期天早上我起的晚一点。在具体的某个时刻用介词at,在具体的某一天的是上午，下午和晚上用介词on,在年月及在上午，下午，晚上用介词in,如in the morning,故选A