单项选择题

A．By grinding heated limestone (石灰石) and clay and mixing them with water.
B．By mixing limestone, clay and water.
C．By grinding limestone and clay under water.
D．By burying limestone and clay underground.
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单项选择题
A．The stationery store has closed down.B．The stationery store is closed.C．The shop assistants have all left at that moment.D．The shop assistants of the store have gone for a long time.
A．The stationery store has closed down.
B．The stationery store is closed.
C．The shop assistants have all left at that moment.
D．The shop assistants of the store have gone for a long time.
单项选择题
A．Later this week.B．It’s unclear.C．On December 26th.D．Immediately after he was separated from his parents.
A．Later this week.
B．It’s unclear.
C．On December 26th.
D．Immediately after he was separated from his parents.
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