Điền từ :

1. Lan usually ........goes..... to school by bicycle.

2. Who .......are......... you looking for now?

3. Where ...........was....... she yesterday?

4. How many .............people.......... are there in your family?- There are five people.

5. How ...........far.......... is it from your house to your school?

Gọi số đó là A. (A\(\in\)N*)

Vì A chia cho 5 dư 1 ,chia cho 7 dư 5 nên ta có:

A=5k+1

  =7h+5         (k;h \(\in\)N*)

=> A+9=5k+1+9=5k+10=5.(k+2)

            =7h+5+9=7h+14=7.(h+2)

=> A+9 chia hết cho 5 và 7

=> A+9= BCNN(5;7)

Mà ƯCLN(5;7)=1 nên BCNN(5;7)=5.7=35

=> A+9=35

=> A=35-9=26

1.What is that?

-It's a pen

2.What is it?

-It is a couch.

3.Is this your bookshelf?

-Yes,it is./No,it isn't.

4.What is there on the table?

-There is a lamp on the table.

1.Who's that?

-She's my sister

2.How old is she?

-She's twenty-four years old.

3.What is her job?

-She 's a nurse.

4.Is your mother a nurse,too?

-No,my mother is a doctor.

5.How many people are there in your family?

-There are four people in my family.