Choose the correct modal verbs

A: We’re having an environment awareness day at school tomorrow.

B: Environmental awareness? What’s that?

A: It’s a special day when we learn about all the things we should/have to (9) do to protect the environment. You know, how we can/have to (10) help to save the planet.

B: That sounds interesting! What do you do?

A: Well, for a start, everybody should/had better (11) walk or cycle to school so that we save energy. And we must/can (12) make sure that we don’t waste energy when we are there.

B: How do you do that?

A: To begin with, we remind everybody that of what they can/don’t have to (13) do save the energy.

B: Like turning the lights in the empty rooms?

A: That’s right. We have the rule. The last person to leave the room must/should (14) turn off the light and close the door.

B: Why do you must/have to (15) close the door?
A: To keep the heat in, of course! You should/can (16) never leave doors open because heat will escape!

B: Never thought of that! Well, I’ll suggest we can/should (17) start the awareness day in my school too! Thanks for the idea!

ответ:Dolls that sing and dance, cars that move at the touch of a button, and flying planes are the toys that make children happy these days. Now let's take a trip back in time. What toys did children have in the 18th century or in Victorian* times?

In those days, building blocks with letters of the alphabet written on them were very popular. These toys helped children learn while playing. Other toys-such as model kitchens, doll houses, toy stoves, and tea sets-taught girls how to run a household. Dolls made of wood, clay and wax were also very popular with girls and prepared them to become mothers.  And for boys, tool kits, trains, cars, trucks, and garages aroused interest in engineering. Although both girls and boys loved their rocking horses and Teddy bears.

Объяснение:заранее не за что

1) The first mechanical computer was invented by Charles Babbage in the early 19th century. 2) The Internet was first developed in 1973 by a Winton Surf while maintaining the Agency for Advanced Studies by the Ministry of Defense of the United States (ARPA) in 2015.

3) Penicillin was accidentally discovered in a Petri dish by Alexander Fleming in 1928.

4)Johannes Gutenberg invented the manual printing press in 1450.

5)The invention of the bulb was developed during the 1800s by Tomas Edison; she is credited with the title of the chief inventor of a lamp, which can burn 1,500 hours without burning (invented in 1879).

6)Television was pioneered in the 1920s by Scottish electrical engineer John Logie Baird.

7)The invention of electricity dates back to the 19th century and is connected with such renowned names as Michael Faraday, Alessandro Volta, Humphry Davy and Andre Marie Ampere.

8)The first petrol-driven car was produced in 1885 by the German engineer Carl Benz.

9)In 1911, Ernest Rutherford, after a series of experiments, came to the conclusion that the atom is a kind of planetary system in which electrons move in orbits around a heavily positively charged nucleus located in the center of the atom (the “Rutherford atom model”).

10)Toilet paper as such (in sheet form) was invented in the 1880s by the British U. Oklok and was called "paper curlers."

11)The first patent for a toothbrush was obtained by an American H.N. Wadsworth in 1850, but mass production in America began only in 1885.

12)In 1873, Colgate introduced flavored toothpaste in a can on the American market.