Question

Choose the option that best fills in the blank:
Edward and Ella worked hard ________ that they could pass the entrance examination.

• A. but
• B. and
• C. after
• D. so

Answer 1

The correct option is D so

'So that' is used to talk about a purpose. In the given sentence, the purpose is to get passed in the examination. 'So that' is used to explain the purpose. Options A, B and C are grammatically wrong. Thus, option D is the correct answer.