Find the one mistake (A, B, C or D) and then corre...

Câu hỏi: Find the one mistake (A, B, C or D) and then correct it: “I can't come (A) in Saturday.” “That's (B) too bad - we've (C) already bought the tickets (D) so you'll still have to pay.”

A. in

B. too

C. already

D. so