Tom ( take) ________________ a photograph of me while I ( not, look) ________________. 14/ We ( not, go) ________________ out because it ( rain) ________________. 15/ What ( you, do) ________________ at this time yesterday? 16/ I ( see) ________________ Carol at the party. She ( wear) ________________ a really beautiful dress.

Khử 16 gam sắt III oxit bằng khí hidro tính thể tích khí hidro đktc cần dùng là