Cho sơ đồ phản ứng: Fe → A  FeCl₂ → B  FeCl₃ → C  FeCl₂. Các chất A, B, C lần lượt là

A. Cl₂, Fe, HCl.

B. HCl, Cl₂, Fe.

C. CuCl₂, HCl, Cu.

D. HCl, Cu, Fe.

Wh-question
1. “What’s your name?” ……………………………………………………………..
2. “What school are you going to?” ...............................................................................................
3. “How many language can you speak?” ……………………………………………………………...
4. “Why do you want to take the course?” ………………………………………………………………
5. “How do you hear about the course?” ……………………………………………………………
6. “How long does the course take?” (I asked…………………………………………………
7. “How much are the course fees?” (I asked………………………………………………….
8. When will the course begin?” (I asked…………………………………………………..
9. “Who will be the teacher of the course?” (I asked……………………………………………………
10. “What time does the classes start and end?” (I asked…………………………………………………….

 Yes-No question
1. “Are you a student?” ( She asked me…………………………………………………………….
2. “Can you speak any foreign language?” (She asked…………………………………………..
3. “Do you want to take part in this course?” (She asked………………………………………….
4. “Do you have any English friends?” (She asked…………………………………………..
5. “Do you have any certificate?” (She asked……………………………………………
6. “Will you be to England in the future?” (She asked………………………………………….
7. “Do you like English songs? (She asked………………………………………….
8. “Are you going to take the level exam this weekend?” (She asked………………………………..
9. “May you book the course fee now?” (She asked……………………………………………
10. “Do you have a phone number?” (She asked…………………………………………….

Nung Fe(NO₃)₂ trong bình kín, không có không khí, thu được sản phẩm gì?

A. FeO, NO.

B. Fe₂O₃, NO₂, O₂.

C. FeO, NO₂, O₂.

D. Fe₃O₄, NO₂, O₂.