Now that you are busy ,let me do it for you.这句中的now that能换成While 还是Since请讲下语法 翻译,

supposing that now you are at the airport,then you can directly take the blue bus to get to the hotel.4124 A：Where are you going now?B：The bus stop A：《 》are you going《 》《 The students are waiting for the bus now用aThe students are waiting for the bus now用at that time yesterday改写句子 Are you s( ) in the supermarket now?No,I’m w( ) for a bus. That sounds good. What are you doing now?什么意思? Now you are just somebody that I used to know. 14—supposing that now you are at the airport, then you can directly take the blue bus to get to the hotel. 4124 什么意思?想问：1—take the blue bus to get to the hotel：这里是take the blue bus to do sth 吗?表示乘车去做某事? now i am gone.If that's the case,are you satisfied (now)? where are you now? Are you free now are you free now Are you free now? Where are you now? Now you are lonely now you are talking Are you b() now? how are you now. Know that you are happy now that I can really feel at