He decided to buy some chocolate kept in an...

Câu hỏi: He decided to buy some chocolate kept in an _______ container for his father, a _______ watch for his mother and a doll with ______ for his little sister.

A. tight air; proof water; white snow 

B. air-tighted; water-proofed; snow-whited 

C. tight aired; proof watered; white snowed 

D. air-tight; water-proof; snow-white