1.    A. relate                   B. relax           C. reply                       D. relic

2.    A. wall                      B. tap              C. hat                          D. bag

3.    A. design                  B. visit            C. ensure                    D. husband

4.    A. parks                    B. spills          C. cloths                      D. maps

5.    A. combed                B. pilled          C. moved                    D. wished

câu hỏi này vẫn chưa bị ai xóa à?

đặt câu hỏi cho phần gạch chân?

1 The population of Vietnam contains a rich………….of ethnic groups.

Adiverse

Bdiversify

Cdiversity

2 Do you fancy……….badminton with me next week?

Ato play

Bplay

Cplaying

3 My mother always gets up………..than everybody else in the house.

Amore early

Bearlier

Cmore earlier

4 Sources of energy……………..more effectively for our future.

Awill use

Bwill be using

Cwill be used

Oh, what can i say? I can only go back to my hometown to visit my grandparents, but I can't go out much. Due to the impact of the Covid-19 epidemic, I only stayed at home for 2 months during the summer. But being indoors a lot doesn't mean it's not fun, I've had time to spend with my loved ones after a stressful study period. Making crafts, watching movies, telling stories,... even though it's just ordinary stories about family and friends, I don't regret taking the time to understand and appreciate my family more.

câu A:

gọi hóa trị của Fe là x

\(\rightarrow Fe_2^xO_3^{II}\rightarrow x.2=II.3\rightarrow x=\dfrac{VI}{2}=III\)

vậy Fe hóa trị III

câu B:

gọi hóa trị của Zn là x

\(\rightarrow Zn_1^xCl^I_2\rightarrow x.1=I.2\rightarrow x=II\)

vậy Zn hóa trị II

học văn đây sao?