He has been tied up all these days. 他这几天都很忙！
A:Hello,what can I do for you,sir?
B:Hello,this is Mike.I'd like to meet your director this week.I have something to discuss with him.
A:Have you made an appointment with him already?
B:I'm afraid not.I'd like to make one if necessary.
A:He has been tied up all these days.You'd better make an appointment first.
B:Okay.How about this Saturday?
A:I'm afraid that we are off duty on weekends.
B:Would he be available on Friday?
A:Let me see.There will be a telephone conference on Friday.He won't have any openings until 4 p.m.
B:Would 5 p.m. on Friday be all right?
A:I think so.