I'm sorry I am very busy at the a______.I'll call you back a
I'm sorry I am very busy at the a______.I'll call you back a
I am very busy at present.Can I call you back later?
sorry i'm very busy.I'llcall you
I am having a class.I will call you back.
I’m sorry I’m busy today .I’ll ring you up s——later.
A____,I'm busy at the moment —Can I phone you back?
Sorry,I'm very busy now.
I'm sorry I can't come to your house today,and I'll call you
I'll call on you at 10:00 tomorrow morning.Sorry,I will be e
帮忙找出语法错误吧,Good Morning I know you are very busy ,I am sorry
I’m sorry I didn’t phone you,but I have been very busy _____
I don't know when Mr.Li ____ back.But I'll call you at once