` B=1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 `

1.Gạch chân đáp án đúng

1,She can(rides,ride,riding)a bike

2,Her birthday is(at,on,in) 29th March

3,My father (don't like,doesn't like,did't like) milke

4, He(have,has,haves) Some toys

5.(Which,where,Who) class is she in class 4A

25% của 2 thế kỉ = Năm

` 2211,84 m2 = ?? ha `

` 3/5 ` chuyển sang hỗn số là :

` (1+1/1. 3) . (1+1/2 . 4) . (1+1/3.5)...(1+1/2019 . 2021) `

` (1+1/1x3)x (1+1/2x4)x(1+1/3x5)...(1+1/2019x2021) `

` 4/9 . 5/6 - 1/3 . 4/9 `

` (1/3+3/8-7/12)x3/4 `

Đặt câu hỏi:

I go to the shoe shop in the aftenoon

. ................................................................

You visit a temple and a church in Thailand. .....................................................................