D.
I.
1.stamp collecting is an interesting hobby.
2.you can learn many things, such as the geography of a country from stamps.
3.postal stamps are a source of interesting facts and important dates about every country in the world.
4.it makes stamp collecting become very popular.
5. as you look at the pages of a stamp album, you can learn interesting details of foreign customs, arts, literature, history and culture.
6.their colors can make you feel relaxed and happy.
7.collecting stamps can become a business.
8.if you are lucky in finding a special stamp, it will bring you some money besides knowledge and pleasure.
II.
$1.$how much does this watch cost ?
$2$.how much do these beatiful scarves cost ?
$3$.can you tell me how to go to dong nai post office ?
$4.$can you tell me how to go to the station ?
$5.$they typing pasts
$6.$peter works hard
$7$.there aren't any bottles on the shelf
$8.$we don't have time to prepare the speech
III.
$1.A $
$2.B$
$3.B$
$4.A$
$5.C$
$6.C$
Test yourself
I.
1.A
2.A
3.D
4.D
5.B
