Question 18: When the opposition managed ________ some evidence of cor

Question 18: When the opposition managed ________ some evidence of corruption, the authorities declared the election ________ invalid.

• A. uncovered – be
• B. uncovering – being
• C. to be uncovering – to have been
• D. to uncover – to be

- manage to V: cố gắng xoay sở làm gì. 
- declare sth to be adj/N : tuyên bố cái gì bị làm sao/là cái gì.