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100

What is the longest river in the world?

The Amazon.

100

 How many bones are there in the human body?

206

100

 When did World War II end?

1945

100

Which is the largest ocean?

The Pacific Ocean.

100

What does FIFA stand for?

Fédération Internationale de Football Association

200

mention one rule of the present progressive 

+ing, e+ing, cvc+ing, expetion

200

What is the auxiliary tense for the simple past?

 did

200

according to the prepositions of time that mean "in, on, at"

en 

200

What happens to the verb when "did" appears?

the verb returns to its base form

200

When can I use the auxiliary verb "did"?

 - ?
300

In what year did World War II begin?

1939

300

If 50 is 100%, how much is 90%?

45

300

Which is the most populous country on Earth?

 China, with a population of 1,383,488,571.

300

What is the name of the official language in China?

 Mandarin.

300

 What was the first metal used by humans?

 copper.

400

According to the preposition of the time when i use the "in on  at" ?

in a preiod of the time 

exact days 

exact moments 

400

According to the present perfect simple tense, tell me its formula?

Pronun+have/has+verb past participle+complement

400

According to the present perfect progressive tense, tell me its formula?

Pronoun + have/ has + been + verb ing + complement

400

What are relative pronouns used for?

add info and replace the pronoun

400

What does 'was' and 'were' mean?

era , fui, estaba

eramos, fuimos, estabamos

500

Que significa can/ could ?

puedo / podria

500

que significa may / might?

quizas 

500

que significa must / have to 

debo y tengo que 

500

que significa should y como se usa dime un ejemplo 

deberias ......

500

que significa would y dime un ejemplo 

algo a futuro en posibilidad.............