填空题
提示：小王有事来找小张，问他可否抽出点时间。小张正忙着准备一份报告，没时间，说他明天有空，同意小王明天再来，答应早上9:30等他。
Wang: Excuse me, Xiao Zhang, but (51)
Zhang: I’m afraid not. I’m busy preparing a report. But (52)
Wang: May I come to see you then
Zhang: (53)
Wang: Will 9:30 in the morning be OK
Zhang: (54) , (55)