15.My grandparents have a big garden and they always spend a lot of time ....on it
A.to working   B.working C. to work D.work
16.my father teaches me how.......and take care .....the flowers in our garden on sundays
A.grow/of   B.growing/of  C.to grow/in  D.to grow/of

\(\left|x-1\right|+\left(y+2\right)^{2020}=0\)

Biết rằng |x - 9| - x = 13. Tìm giá trị của x.

8 giờ 10 phút - 7 giờ 35 phút