Thirty years(1) ago in Vietnam, very(2) few people had TV set. These owners very(3) popular After dinner, their neighbors gathered both (4) inside and outside their house. Some watching through the windows.

(5) All evenings, they sat and watched the black and white programs. The(6) olderpeople sleep a little and the children might play(7) with their friends, but no one went home(8) untill the TV programs finished. Time have changed.(9) Today, many families have TV set. People sit in the own living rooms and watch TV. Like is (10) more comfortable now, but many neighbors don't spend time together any more.

Give the correct form of these verbs:
1.The sun (set) ………………………………sets……………………………………………in the West.
2.It usually (rain) ……………………rains………………………………………………………in the summer.
3.They (build) ………………build…………………………………………………………….
4.Bees (make) ……………………make………………………………………honey.
5.They (get) ………………………are getting……………………………………………on the scale now.
6.The earth (circle) ………………circles………………………………………the Sun once every 365 days.
7.Rivers usually (flow) ………flow………………………………………… to the sea.
8.Don’t worry. I (give) ………will give……………………him your message when I (see) …………see……………… him.
9.Look! Jane (play) ……is playing……………………  the guitar. Hurry up! The bus (come) ……………is coming……………… .
10.I (not talk) …………am not talking ………………………………………… to her at present.
11.How often………does………………… she (go) ……………go…………… fishing?
  - She (go) ……goes………………………………once a year.
12.....are......... your friends (be)………………………… students?
  -Yes, they (be) ........are..................
13...........are..... the children (play)…………playing……………………………… in the park at the moment?
 -No, they aren’t. They (learn) ............are learning.......................... to play the piano.
14………do…………….you (go)……………go…………….. to school on Sundays? – Yes, I do.
15.My mother (cook) …………is cooking……………………………a meal now. She ( cook)……cooks……………… everyday.
15.What………is……………… your mother (do)……………doing……………. at this time? 
 - She (make)………is making………………………a dress.
16......does....... she often (go)……………go……………… to the cinema every weekend?
17.I don’t know. But she always (go) .......goes.................. to the church on Sundays.
18.The students (not be) ................aren't........................... in class at present.
19.She always (wash) .............washes....................... the dishes after meals. 
20.I (do) .............am doing.............................  an exercise on the present tenses at this moment and I (think) 21........think.................................... that I (know) ............know...............................  how to use it now.
22.My mother sometimes (buy) ..............buys............................. vegetables at this market.
23.It (rain) ............rains...............................  much in summer. It (rain) ..................is raining.........................  now.
24.Daisy (cook) .............is cooking.............................. some food in the kitchen at present. She always (cook) ......................cooks.....................  in the morning.

Câu 8 ạ. What a difficult exercise!

8. What a dificult exercise!

Câu 4:
- She likes milk the most.

Câu 4 cũng có thể là"She likes milk best" đúng không anh?!

a) Để hàm số đã cho là hàm bậc nhất thì $m-2\ne 0\iff m\ne 2$

b) Để hàm số đã cho đồng biến trên tập xác định thì :

$m-2>0\iff m>2$

c) Để hàm số đã cho nghịch biến trên tập xác định thì:

$m-2<0\iff m<$$2$