When are you going to help me with my Maths?A.in May 3rd B.In Sat_英语解答

When are you going to help me with my Maths?
A.in May 3rd B.In Saturday morning C.At 7:00 in the evening D.On October

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解答

C.At 7:00 in the evening
在某一天应该用on,如A B.
没具体到某一天,应用in,如D
在几点钟,用at 如C