\(\dfrac{2}{5}\)xy(xy-5x+10y)

(a²+1)²-(a²+a+1)(a²-a+1)

1, The girls/eat/breakfast/canteen/now

=> The girls are eating breakfast at the canteen now.

2, Ba likes drawing best (rewrite)

=> Ba is interested in drawing .

Vì câu 2 chỉ nói là thích nhất chứ chưa chắc là Ba đã giỏi môn ấy nênđiền là interested in, còn câu 1 ko chắc đúng

a.3

b.Loại

c.1

d.4

e.5

f.2

21. We should play sports or do exercise in order to stay in __________.
A. look
B. health
C. fit
D. shape
22.The Japanese eat a lot of fish instead of meat ______ they stay more healthy.
A. because
B. so
C. although
D. but
23. I forgot to wear a sun hat today and i got a __________.
A. earache
B. backache
C. headache
D. stomachache
24. We need to spend less time __________ computer games.
A. play
B. to play
C. playing
D. to playing
25.When you have a temperature, you should drink more water and rest……
A. more
B. most
C. less
D. all
26. Rob eats a lot of fast food and he __________ on a lot of weight.
A. takes
B. spends
C. puts
D. bring
27. When you have flu, you may have a cough and a __________ nose.
A. running
B. runny
C. noisy
D. flowing
28. Do more exercises __________ eat more fruits and vegetables.
A. and
B. or
C. but
D. so
29. Watching too much tv is not good __________ you or your eyes.
A. at
B. for
C. with
D. to
30.
After working on a computers for long hours, you should __________ your eyes and relax.
A. wake
B. rest
C. sleep
D. sleep in