Tìm giá trị của x để biểu thức B = X mũ 2 - 4X +2020 / X mũ 2 -2 X +1nhận GTNN LÀM ƠN HỘ MÌNH NHANH 5 SAO + TRẢ LỜI HAY NHẤT

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Giúp mình với Ex: Supply the past simple or ferfect from of the verbs in brankets, then complete sentences 1 We (love) here for two years ..................................................... 2 They (live) in Washington in 1960 ............................................................ 3 Lan(leave) Ha Noi last month and(work) in HCM city since then ................................................................................................................ 4 Mr Nam (teach) English since 2000 ................................................................. 5We (buy) this car two years ago ...................................................... 6 How long you (learn) English? ...................................................... 7 I ( not see) him since We (say) goodbye ........................................................................ 8 Yesterday I( visit) my parents ........................................................ 9 I (learn) English for ten years ..................................................... 10 Lan and Nga( be) close friends since last years ...................................................................................... 11 What you (do) yesterday ...................................................................................... 12 I (read) the novel written by Jack London Several times ...................................................................................... 13 She (be) born in 1980 ...................................................................................... 14 Mr Hung(teach) English in this school since he (graduate) from university in 2000 ......................................................................................... 15 Last month I (be) in the hospital .......................................................................................... 16 I(have) a computer since my nineteenth birthday ........................................................................................... 17 The last time I ( go) to HCM city was in 2012 .................................................................................. 18 We (move) here in 1998 . We (be) here for a long time now ......................................................................................................... 19 She (come) to China 4 times. She loves this country ................................................................................................ 20 It was so hot that I( go) swimming with my friends yesterday ................................................................................................................