online

26. not have/credit card/find/difficult/book/airline ticket/online

A. Although I didn't have credit card, I found difficult to book an airline ticket online.

B. I don't have a credit card, I found it difficult to book an airline ticket online.

c. Not having a credit card, I found it difficult to book an airline ticket online.

D. As I don't have a credit card, so I found it difficult to book an airline ticket online.