Điền a/an 
I arrived in the USA last Monday. We left [1]____ Rome, flew over the Alps and made [2]____ quick stop in [3]____ London. There we went shopping at [4]____ Harrods, visited the Tower and enjoyed [5]_____sunny afternoon in [6]____ Hyde Park. On the following day we left for[7]____ New York. The time on board wasn’t boring as there were two films to watch on the monitor.The people on the plane were all [8]____ Italian. Before we landed at [9]____ JFK airport, we saw the Statue of Liberty, [10]____ Ellis Island and the Empire State Building. The hotel I stayed in was on the corner of [11]____ 42nd Street and [12]____ 5th Avenue. I don’t like  hotels very much, but I didn’t have [13]____ time to rent an apartment.

Điền a/an

1.Tthere is ............ green english book on the desk

2. She's reading ............ old comic

3. They've got .... idea

4.He is drinking...........cup of coffee

5.the girl is...............pilot

6.Leipzig has......... airport

7.This is................ expensive bike

8.Look! There's.......... bird flying

9.My father is.......... honest person

10.My friend likes to be ................... astronaut

 đề: điền a/an

1...... chair

2...... old man

3...... box

4...... pencil

5...... animal

6...... ink-pot

7...... book 

8...... eye

9...... cat

10..... arm

11..... ugly dog

12..... girl

13..... student

14...... small apple

15...... computer

16...... hour

17...... year

18...... ear 

19..... younger

20..... united person

1. you drink too much coffe,that's why you can't sleep.

     if you do not

2.you press this button to stop the machine.

    if you want

3.make me some coffee, and I'll give you one of my biscuits.

    if you do not

4.working so much will make you tired.

  if you do not

1.it seems to be going to rain soon. Bring thí umbrella not to get wet.

   if you don't 

2. I'll call the police if you don't leave me alone.

   Unless

3. in the snowy weather we don't go to shool
    if it ís not

1.i don't have money, so i can't lend you any

   if I have 

2. I might be late . if so , let's start winthout me

   if i am

Với số tiền để mua 135 mét vải loại I có thể mua được bao nhiêu mét vải loại II, biết rằng giá tiền vải loại II chỉ bằng 90% giá tiền vải loại I

1. The teacher is ( in the classroom ) right now.

2. Dr.Green is staying (at the Plaza Hotel) .

3. I(catch the bus ) to my new office.

4. The construction workers (eat lunch) in the park.

5. She leaves for work (at about 7 a.m)

6. He (went to the gym) after school yesterday.

7. She will have dinner with (her friend) tomorrow night.

8. Tonight she will sleep on her sofa (as his bed is broken).

9. (The students) are studying Chemistry in the laboratory.

10.It costs me ( five minutes) to walk to school.