1、Mr.Edward was not in,so his brother acted as ---at the par

1、Mr.Edward was not in,so his brother acted as ＿＿＿at the party.A、actor B、guest C、host D、ghost 2、He is a leading authority＿＿＿plant diseases.A、on B、about C、for D、of 3、– Li Hua failed in the math examination.–＿＿＿ A、I’m sorry to hear that.B、Bad luck!C、What a pity!D、Bad news.4、– Excuse me,sir.- ＿＿＿– I’d like to cash a check.Would you please tell me which window should I go to?A、What can I help you?B、Yes,may I help you?C、It’s all right.D、It doesn’t matter.5、– Good morning.I’d like to check out now please.–＿＿＿ A、Thank you!I will do it immediately.B、Sorry.Wait a moment.C、Your name and room number,please?D、OK.I’ll check the computer.