English is widely used. Many business letters around the world _____________(write) in it.
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They ___________(ask) to help the farmers with the harvest last autumn.
The dirty clothes ___________(wash) by his mother now.
根据示例改写句子Example:They build this hotel with a lot of ice and snow.This hotel is built with a lot of ice and snow (by them).1.The waitress will bring you a cup of coffee as soon as possible.2.They serve breakfast at 7:00 am.3.The bellboy brings the customers' bags to their rooms.
用来表示各种计数制数码个数的数称为( ),同一数码在不同数位所代表的( )不同。