Question

【题目】The maths problem was so difficult that none of us could _______.
A.try it out
B.work it out
C.look it up
D.work on it

Answer 1

【答案】B
【解析】句意：这道数学题太难没人做得出来。try out试用，试验;work out算出；解决； look up查找；work on从事；根据题意所以答案是B。