you must ____(knock)on the door before you enter

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• 请专业人士帮我翻译哈·后天中午前需要If you visit a Chinese family you should knock at the door first . When the door opens , you'll not move before the host says , “ Come in , please .” After you enter the room , you wouldn't sit down until the host asks you to take a seat . when a cup of tea is put on a tea-table before you or passed to your hand , you'll say “ Thank you , ” and receive it with your two hands , not one hand , or they'll think you are ill-mannered . B
• 写出与句中划线部分意思相近或相同的词语1.Could I go to the cinema this evening,Mom?(go to the cinema划线）2.Can we have breakfast before seven o'clock( have breakfast 划线)3.Joe has to do some washing on Sunday morning.(do some washing)4.I must get there on time.(must )5-Could you please buy me a ruler?-Certainly.(Certainly.划线）
• 单选： 1.-What do you want to be when you grow up? -____teacher like you. a.The b.An c.A d./2.-Will you please answer the door? It____be your sistor.-Sorry, I____. I'm feeding the rabbit.a.must;mustn't b.may;can'tc.shall; will d.must; needn't
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