UNIT-6

U6-ex6.
1.to run forests
2.sharp claws
3.to make growling noises
4.to scream for help
5.to run away in fear
6.a dark cave
7.to be fast sleep
8.to start a fire
9.to pick fruit
10.to work on an experiment
U6-ex7.
1.b 2.c 3.a
U6-ex8.
1.had already started
2.had shown
3.had been traveling
4.had been typing
5.had saved
6.had been practicing
7.had been looking
8.had left
U6-ex10.
must=have to
mustn`t=don`t have to
are not allowed to=needn`t
U6-ex11.
In the museum,you
a.mustn`t take photos
b.must buy a guidebook
c.needn`t leave your bags at the door
d.mustn`t touch the exhibits
In the hotel,you
a.mustn`t disturb the other guests
b.must leave the room by 12:00
c.needn`t tidy your room
d.mustn`t leave any valuable in the room
U6-ex13.
Hippos are bigger teeth than giraffes.
Hippos are bigger mouth than giraffes.
Hippos are as heavy as giraffes.
Hippos are longless neck than giraffes.
Hippos aren`t as tall as giraffes.
Hippos are fatter than giraffes.
Hippos are run fastless than giraffes.
Hippos are as dangerous as giraffes.