If my elder sister hadn’t opened the window at nig...

Câu hỏi: If my elder sister hadn’t opened the window at night, she would not have caught a cold

A My elder sister opened the window at night, but she would not have caught a cold

B My elder sister opened the window at night, so she did not catch a cold

C My elder sister did not open the window at night, but she caught a  cold

D My elder sister opened the window at night, so she caught a cold