B C D C B D A D D B A C A C C  C B C D A A D C C A B B C D A D A C D B A C D C A D

a: \(\Leftrightarrow\left\{{}\begin{matrix}6x+3y=3\\6x+8y=-2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}y=-1\\x=1\end{matrix}\right.\)

Hình ảnh Lục Vân Tiên được khắc họa theo mô típ quen thuộc của truyện Nôm truyền thống: một chàng trai tài giỏi cứu một cô gái thoát khỏi tình huống hiểm nghèo, rồi từ ân nghĩa đến tình yêu… như chàng Thạch Sanh đánh đại bàng, cứu công chúa Quỳnh Nga (“Thạch Sanh”). Mô-típ này thể hiện niềm mong ước của tác giả và cũng là của nhân dân. Trong thời buổi nhiễu nhương hỗn loạn này, người ta trông mong ở những người tài đức, dám ra tay cứu nạn giúp đời.

12 will have

13 wouldn't happen

14 won't play

15 will you do

15 C

16 C

17 B

18 D

19 C

20 C

12 will have

13 wouldn't happen

14 won't play

15 will you do

15 C

16 C

17 B

18 D

19 C.

20 C

7 B

8 D

9 D

10 B

11 A

12 D

13 C

14 B

15 A

16 B

17 A

18 A

19 B

20 D

21 B

22 C

23 A

24 B

25 B

26 B

27 D

28 C

29 C

30 D

sau đăng nhớ tách bài ra nhé

Ex 1

1 am

2 doesn't study

3 aren't

4 Does he have

5 have

6 Does she live

7 are

8 Does my sister work

9 Do dogs like

10 lives

11 rains

12 fly

13 doesn't fry

14 closes

15 tries - don't think

16 passes

17 is - watch

18 has

19 leaves

20 has to

21 play

22 drinks

23 does she speak

24 are spoken

25 are not polished

26 rains

27 arrives

28 starts

29 come

30 does he do

Ex 2

1 is living

2 isn't having

3 am studying

4 is designing

5 is reading

6 is studying - is listening

7 are running

8 are having

9 is playing

10 are watching

11 is staying

12 is always forgetting

13 is being washed

14 is riding

15 isn't being taken

16 are hanging

Ex 3

1 is listening

2 rains

3 works - isn't working

4 is running - wants

5 speaks - comes

6 is coming- are meeting

7 Do - go - do - stay

8 is holding - smell

9 is snowing - snows

10 swims - doesn't run

11 Do - enjoy - am having

12 don't know

13 are - doing - am staying

14 think - looks

15 live- am staying

16 am driving

17 are lying

18 listen - are - listening

19 doesn't understand - are talking

20 does - weigh - looks

Ex 4

1 stayed

2 didn't go

3 had

4 Was my ...

5 visited

6 felt

7 bought

8 Did Lan and Mai see

9 Did Trung eat

10 Did they talk

11 returned

12 didn't think

13 went

14 drove

15 arrived - was

16 had 

17 came

18 told

19 walked

20 visited - was

21 bought

22 moved

23 didn't go

24 Did she get

Hello! John.
OK. So we'll go on a sightseeing tour by bikes at weekend