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1. cleaned

2. don't have

1. A. autumn   B. winter    C. summer    D. season

2. A. who    B. what    C. there    D. when

3. A. danced    B. song    C. stayed    D. listened

4. A. football    B. play    C. volleyball    D. badminton

5. A. doing    B. watching    C. spring    D. reading

II. Select and circle A, B, C, or D.

1. What do you usually do ______ spring?

A. on    B. by

C. at    D. in

2. There ______ a lot of flowers at the festival last week.

A. are    B. were

C. was    D. is

3. ______ did they do yesterday?

A. What    B. When

C. Where     D. Who

4. ______ you going to Nha Trang next week?

A. Is    B. Are

C. Do    D. Did

5. Peter doesn’t want ______ football.

A. play     B. played

C. to play     D. to play

My friends ( like)………like………..soccer. They ( play)…play…………………….it every Sunday afternoon. They ( play)………are playing……………..soccer in the schoolyard now.

mn giúp mik vs nha mik camon

1. having

2.weather

3.eaten

4.go

1. Hien fells very ..................... because she lives far from  her parents and friends.

A. happily            B. happy              C. unhappily        D. unhappy

2. It started to rain, ..................... we went inside and watched TV.

A. although                    B. so                     C. because            D. but

3. John..................... return to America yesterday.

A. doesn’t             B. isn’t                          C. didn’t              D. wasn’t

4. My father ..................... Kuala Lumpur three times.

A. visit                 B. will visit                    C. visited              D. has visited

5. Amsterdam is one of the ..................... cities in the world.

A. peacefulest       B. peacefuler        C. most peaceful  D. more peaceful

6......................the weather is good, Linh will go out with us.

A. if                      B. unless              C. although          D. however

7. Don’t ..................... electricity.

A. to           waste          B. waste               C. wasting            D. wastes

8. We must be quick. There is ..................... time left.

A. little                 B. few                   C. much                D .more

9. They are  often free ……………….. Sunday morning 

          A. in                    B. on                    C. at                               D. with 

10. You can use a………………….. to change  channels.             

         A. screen                        B. schedule           C. remote control  D. viewer

\(\dfrac{1}{2}.\left(\dfrac{1}{2}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{6}+......+\dfrac{1}{2x-2}-\dfrac{1}{2x}\right)=\dfrac{3}{16}\)

\(\dfrac{1}{2}.\left(\dfrac{1}{2}-\dfrac{1}{2x}\right)=\dfrac{3}{16}\)

\(\dfrac{1}{2}-\dfrac{1}{2x}=\dfrac{3}{16}:\dfrac{1}{2}\)

\(\dfrac{1}{2}-\dfrac{1}{2x}=\dfrac{3}{8}\)

        \(\dfrac{1}{2x}=\dfrac{1}{2}-\dfrac{3}{8}\)

         \(\dfrac{1}{2x}=\dfrac{1}{8}\)

⇒x=8:2=4

a) Có số góc đc tạo ra là : \(\dfrac{12.\left(12-1\right)}{2}\)=66( góc)

b) Có số góc đc tạo ra là : \(\dfrac{n.\left(n-1\right)}{2}\)

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