Vera is a hairdresser. she ....lives..........in a small town. her.......work............. starts early. she gets up at 7....o'clock.........in the morning. at 7.30 she makes ......some...... coffee. she doesn't have breakfast. she ......leaves..................... home at a quarter past eight . she doesn't have a car. she takes the bus to work. she starts .....work......... at ten to nine . she likes her job because she.....can.............. talking to people at twelve o'clock . in the .....afternoon.......    she likes reading and listening to music . on weekends she visits........her............ father. he lives in the city center

1. What does Lien do when.......warm ?

A. it                                        B. it's                                  C. its                    D. they're

2. She doesn't have...........friends at school

A. a                                      B. some                                C. many               D.much

3. What about ...............to Hue on Sunday? Ban xem lai de 

A. to go                              B. one                                   C. three                 D. goes

4. Thre are........fingers in one hand

A. ten                               B . one                                    C.three                    D.five

5. What are you going...........this summer vacation?

A. to do                          B. do                                         C. doing                  D. does

1. I (walk) .....walk....... to school every day. I (not take) ...don't take.......... the bus.

2. + What ........are...... (you, read) .....reading....... right now ?

     - I (read) .....am reading......... my grammar book.

3. Mai and Lan (sit) ......sit....... next to each other in class every day, so they often (help) ......help.... each other with their grammar exercises. Right now Mai (help) ......is helping....... Lan with an exercise on presenr verb tense.

4. It (rain) ...rain.......... a lot in this city, but it (not rain) ...isn't raining........... right now. The sun (shine) .......is shining...... . Does It (rain) .rain........... a lot in your hometown ?

1 Her lips are full->her lips aren't..........thin..............................

2 The flowers are beautiful->they...are beautiful flowers......................................

3 Where do you live->what.........is your address...?.........................................

4 Where does she live-.>what.......is her address ?.............................................

1. Fire .......is....hot.............

2. Balls and oranges ....are..round....................

3. An elephant .......is...big................ but a mouse ......is..small.................

4. Good health ......is..important.......................

5. A coin .............is............ small, round, and ...........flat..................

6. He ..............is............ one of the ..............best............... students in my class.

7. Diamonds ............expensive ..................

8. Nam has a collection of stamps. It .......is beautiful.................

1. My father never ......................... coffee. (drink/ drinking/ drinks/ to drink)

2. Nam likes .................  volleyball. (play/ playing/ plays/ to playing)

3. There are ..................... TV programs for teenagers nowadays. (little/ few/ much/ any)

4. ........................ do they get together?- Every Wednesday afternoon. (Where/ How/ When/ How often)

5. The magazines are on the racks .............. the middle of the room. (on/ in/ at/ from)

6. A ................. CD player is good because you can take it everywhere. (portable/ modern/ good/ powerful)

7. Reading is her favorite ........................... . (pastime/ action/ subject/ sport)

Ta có:

\(\frac{1}{x}-\frac{1}{x+1}=\frac{1}{2}\)

\(\frac{x+1}{x.\left(x+1\right)}-\frac{x}{x.\left(x+1\right)}=\frac{1}{2}\)

\(\frac{x+1-x}{x.\left(x+1\right)}=\frac{1}{2}\)

\(\frac{1}{x.\left(x+1\right)}=\frac{1}{1.2}\)

\(x.\left(x+1\right)=1.2\)

Vì x và x+1 là 2 số tự nhiên liên tiếp mà x<x+1

=>x=1, x+1=2

Vậy x=1

Gọi số cần tìm là abcd

ta có 30000 + abcd = 9abcd

=>3000=8abcd(đã bớt 1abcd ở cả 2 vế)

=>8abcd = 30000

=> abcd =  3750