Heating the news that my father was ill，I was so worried that I couldn’t        on anything．

A.count

B.consider

C.contain

D.concentrate

答案及解析： D

解析：

考查动词辨析：A．count数数，B．consider考虑，C．contain包含，D．concentrate 专注于，句意是：听到我父亲生病的消息，我很担心以至于不能专注任何事。选D。