C
concentrate v.全神貫注,精神集中,專心致志;集中,集合;濃縮
We should concentrate all our efforts on improving education.我們應該集中精力努力改進教育工作。
Troops are concentrating south of the river.軍隊正向河的南邊集結(jié)。
n.濃縮液
【用法】concentrate(sth.)on sth./doing sth.
【全真考題】Anne couldn't concentrate what she was doing while her family were watching TV.(93.1)
A.to B.on C.for D.in