________ themselves, the employees in this company usually have a coffee or tea during their break time.

A．Refreshing

B．To refresh

C．Refresh

D．Having refreshed

酵母发酵葡萄并产生无甜味葡萄酒时（）。

A.产生大量芳香化合物

B.在酒中产生大量蛋白质

C.用尽酒中的矿物质

D.用尽酒中的糖