题目
After patient observation, we why the bridge was sinking.A.A cleaned upB.B uilt upC.C found outD.D took out
After patient observation, we why the bridge was sinking.
- A.A cleaned up
- B.B uilt up
- C.C found out
- D.D took out
题目解答
答案
C
解析
本题考查动词短语的辨析，核心在于理解句子逻辑关系。关键点在于“patient observation（耐心观察）”与后续动作的连贯性。需明确每个选项的含义及适用场景，尤其注意固定搭配的使用。
选项分析
A. cleaned up
意为“清理、整顿”，与“观察后得出结论”无关，排除。
B. built up
意为“建立、增强”，无法表达“通过观察查明原因”，排除。
C. found out
意为“查明真相、发现事实”，符合“通过观察得出桥下沉原因”的语境，正确。
D. took out
意为“取出、拿出”，与观察结果无关，排除。