Question

[Mèo Méo]

To walk on the moon, the astronauts had to carry a suitcase ... contained oxygen.

A. which  B. it  C. having  D. where

Answer 1

[Minh Nhân]

To walk on the moon, the astronauts had to carry a suitcase ... contained oxygen.

A. which  B. it  C. having  D. where