If it is a professional examination for the college entrance examination, the music selection is required to be of a certain degree of difficulty and to demonstrate your level and characteristics to the greatest extent.
"My Dear Dad" may be a little small, but the content of this song is very rich and requires delicate and precise expression. In addition, it has big jumps, which makes it difficult to express and very expressive. It is well-known and can be used as an exam repertoire.
Also recommended are:
"Song of Solveig", which has high requirements for strong and weak sounds
"Three Wishes of a Rose", for The requirements for breath are very high
"Yellow River Resentment" requires drama and tension
"For art, for love", "A Sunny Day" and "The wonderful moment is coming" , "I Want to Live in a Sweet Dream", "Venice Carnival" and "Antonida Romance" are all good choices, but they require high personal abilities and a corresponding opera background. Some of these repertoire are suitable for lyric soprano, some are suitable for dramatic soprano, and some are suitable for coloratura soprano. You should choose according to your own characteristics.
Wish you success in the exam!