i-20 用英语怎么说

i dash twenty.
其实一般说i twenty就好，除非你要强调“-”

1 one 1st
2 two 2ed
3 three 3rd
4 four 4th
5 five 5th
6 six 6th
7 seven 7th
8 eight 8th
9 nine 9th
10 ten 10th
11 eleven 11th
12 twelve 12th
13 thirteen 13th
20 twenty 20th

I-twenty 是美国学校发来的入学通知书。
签证时，签证官可以和你说汉语的。

i-20就说i twenty
或者i dash twenty

i twenty

I-twenty