填空题

This ______ (discover) of diamond came at time when there was a big demand.

【参考答案】

discovery
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填空题
If you had spoken clearly, you ______(understand).
单项选择题
Where does this conversation probably take place？（）

A．In a shoe shop.
B．In a warehouse.
C．In a department store.
D．In a store for man’s clothes.
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