【常用句子】
1.This connection is confusing.
2.This connection is a problem for me.
3.I'm having trouble hearing you, because this connection is really bad.
4.I'm having trouble hearing you, because the signal isn't very clear.
5.I have trouble hearing you, because you speak too quickly.

【常用对话】
1
A: Most of the new ad. campaigns are very good.
B: I'm sorry. What did you say?
A: Wait a second. This connection is confusing.
2
A: What? Could you repeat that?
B: I said that a sales representive will contact you soon.
A: I'm sorry. I have trouble hearing you, because you speak too quickly.