i am sorry___that 1 hear 2 to hear 3 hearing 4 heard 请问选择哪一个,及分别说出每个为什么对与错

问题描述:

i am sorry___that 1 hear 2 to hear 3 hearing 4 heard 请问选择哪一个,及分别说出每个为什么对与错

2 to hear
be sorry to to something