B4

Animals can be pets, but they can also be much more. Ever since dogs first joined humans on the hunt, animals have worked with people.

(past simple, т.к. это определённое время в прошлом)

JOIN

B5

Dogs, of course, work with people in many different ways, such as controlling on farms.

(контролирование)

CONTROL

B6

They can also be trained to help blind people find their way around.

(present simple passive, т.к. это общее утверждение. Их могут натренировать)

TRAIN

B7

There are a lot / lots of other animals that help people, including horses, camels and elephants.

(много)

LOT

B8

In the past, horses were an important means of transport in Europe and carried both people and goods.

(past simple, т.к. это определённое время в прошлом)

CARRY

B9

Cars soon replaced horses for most jobs because they could go faster and further / farther.

(дальше)

FAR

B10

In Asia today, as in the past, elephants are used to transport heavy loads in areas where cars cannot go.

(present simple passive, т.к. это общее утверждение. Они используются)

USE

B11

As long as there are jobs for them to do, we can be sure that our animal partners will continue help us.

(будут продолжать)

CONTINUE