—Could I speak to Tom, please?        

—Sorry, he isn’t here at the moment. He _______Hangzhou on business .        [ ]

A. went to  

B. has gone to  

C. goes to  

D. has been to

按照要求，船舶装卸爆炸品、一级易燃液体、毒害品和放射性物品时，其装卸机具应按额定负荷降低（）使用。

A.10%

B.15%

C.20%

D.25%