1.a

2.c

3.a

4.c

5.b

what

 Mình viết thiếu câu cuối 

Câu cuối là

Green trees are going to be planted around their school

1.My brotherhas played soccer since he was eight

2.The last time i meet Lan was

2.weeks ago

3.Unless you learn hard,you can't pass the next examination

4.Green trees are going to be

Chucs banj hocj toots

16.b

17.b

18a

19.c

20.b

WHERE IS SHE GOING? 

CHÚC BẠN HỌC TỐT!

ĐÚNG

CHÚC HỌC TỐT

số cần tìm là 259 

``CHÚC BẠN HỌC TỐT!``

(450 x 27) chia 50

=(450 : 50) x 27

=9 x 27

243

CHÚC BẠN HỌC TỐT TYM TYM