IV use the correct form of the word given in brackets to make a meaningful sentence

1 there are flights daily from Ho Chi Minh to Nha Trang [day]

2 They have been active to participate in the contest [ participate]

3 over 200 competitions entered the race [ compete]

4 Tom and Peter want to visit an ocean institute in Viet Nam [ ocean]

5 Two representers from the group '' Friends of the earth'' are taking to the students [ represent]

6 this temple was built by the local inhabitants over 100 years ago [ inhabit]

7 It has become increasingly difficult to find a job nowadays [ increase]
8 environmental protector is very one's responsibility [ protect]

9 I think it's very reasonable of him to expect us to work over time every night this week [ reason]

1/He couldn't make his motor bike started this morning.

2/I dislike listening to music while doing my homework.

3/These tigers used to be kept in iron cages.

4/What were you doing when i phoned you last night ?

5/When we entered his room, we saw him was sleeping in an armchair.

6/She said that her mother weren't very well, so she couldn't go to the party.

Vì |4 + x| > 0

=> 2|4 + x| > 0

=> | 6-2x | - 2 | 4+x | < |6 - 2x|

Dấu "=" xảy ra

<=> |4 + x| = 0

<=> 4 + x = 0

<=> x = -4

Khi đó giá trị của biểu thức là

|6 - 2(-4)| - 2.0

= |14| - 0

= 14 - 0

= 14

KL: GTLN của biểu thức = 14 khi x  = -4

Ex1: Nối cột a với cột B sao cho thích hợp:

1+D 2+A 3+E 4+I 5+G 6+J 7+H 8+B 9+F 10+C

Ex2:In the following pairs of sentences, one verb form is right and one is wrong.Put a tick(dấu V ý nhé) next to the right one and a cross(x)next to the wrong one:

1:Example :I saw Peter yesterday. V(V là ý đúng) - I have seen Peter yesterday. x(x là ý sai)

2:What did you do last night? V - What have you done last night? x

3:I went to many countries in my life x - I have been to many countries in my life V

4:He went to Greece two years ago V - He has been to Greece two years ago x

5:I study English for three years x - I have studied English for three years V

6:I have known Mary for a month V - I have known since a month x

7:Where are you bought your shoes? x - Where did you buy your shoes? V

8:He and his wife have lived here for many years V - He and his wife have lived here since many years x

Ex3:Match each word in list A with its opposite in list B

1: difficult_easy

2: big_small

3: healthy_ill

4: interesting_boring

5: useful_useless

6: dangerous_safe

7: quiet_noisy

8: amusing_sad

9: beautiful_ugly

10: old_new

Ex4:Complete each sentences with the suitable word in the box

1/When Tuan was 5 years old, his father took him to the swimming pool to teach him how to swim.

2/It is necessary that you review your lessons before you go to class.

3/Nga prefers playing sport to watching them on TV.

4/We sometimes have to go to school early to do class duties.

5/If you want to pass the exam, you should work harder.

Trọng lượng của vật: P=10m=10.200=2000 (N)

a)Công suất nhà máy đã thực hiện trong thời gian nâng vật: P₁=\(\dfrac{A}{t}=\dfrac{P.h}{t}=\dfrac{2000.12}{20}=1200\) (W)

b)Hiệu suất trong quá trình làm việc:

H%=\(\dfrac{P_1}{P}.100=\dfrac{1200}{1500}.100=80\%\)