I.
1, will play
2, will arrive
3, spent
4, has not ridden
5, is grazing
6, have been
7, has lived
8, doesn't excite
9, to visit
10, driving
11, Have you ever taken
12, provide
13, spent
14, has been
15, is practising
16, Did your family move
17, Are produced
18, will visit
19, coming
20, to herd
II.
1, e. 2, c. 3, g. 4, f
5, h. 6, b. 7, a. 8, d
III.
1, There are 54 ethnic groups in Vietnam.
2, They mostly inhabit the Red River Delta, The Mekong Delta and major cities.
3, It is around 1 million.
4, Brau, Roman, Odu have the smallest population.
5, Most ethnic people mainly live on met rice cultivation.
6, No, they don't.
7, It is diverse and special.
IV.
1, B → to send
2, C → different from
3, B → more comfortable
4, C → I
5, A → run as quickly
6, B → is
7, C → for
8, B → hot
9, C → cheaper
10, D → is living
V.
1, We haven't seen her since Christmas Day.
2, This is the first time I have eaten this kind of food.
3, It has rained for an hour.
4, The last time we visited my grandparents was two months ago.
5, I began studying English three years ago.
6, It's nearly five years since my brother saw his best friend.
7, How long have you learn English?
8, Jane is the same high as her older sister.
9, Those houses are larger than these house.
10, My backpack is different from your backpack.
