--- Look! Everything here is under construction.

--- What’s the pretty small house that _______ for?

A．is building

B．is being built

C．is built

D．had been built

工作票有破损不能继续使用时，应补填新的工作票，并（）。

A．经调度值班员同意

B．重新履行签发许可手续

C．重新履行许可手续

D．电话告知工作票签发人