We must on our study..
A. concentrate
B. concentrate at
C. concentrate on
D. concentrate with
网友回答
A. concentrate
B. concentrate at
(答案→)C. concentrate on
D. concentrate with
解析:题意为:我们必须全神贯注于我们的学习。此题考查固定短语的应用。Concentrate on … 意为“集中(注意力)于….专心于…”。其余选线不存在搭配。故选C。