VOCABULARY
OBLIGATION
NO OBLIGATION
ZERO CONDITIONAL
GENERAL
100

ordenador portátil

laptop

100

they / do / their homework

They have to do their homework.

100

Me and my brother / go / to school / yesterday

Me and my brother didn´t have to go to school yesterday.

100

When you ____ (to heat) ice, it _____ (to melt).

When you heat ice, it melts.

100

What is the World's Smallest Country?

Vatican City

200

inclinar la pantalla

tilt the screen

200

he / study / English

He has to study English.

200

the girl / run / in / the corridor

The girl doesn´t have to run in the corridor.

200

My mother ____ (to get) angry when I _____ (not do) my homework.

My mother gets angry when I don´t do my homework.

200

Which is the nearest star to planet earth?

the Sun

300

cámara web

webcam

300

my mother / cook / breakfast

My mother has to cook  breakfast.

300

I / wake up / early / tomorrow

I don´t have to wake up early tomorrow.

300

If you _____ (to mix) red and green, you _____ (to get) brown.

If you mix red and green, you get brown.

300

Which is the largest country in the world by land area?

Russia

400

deslizar la pantalla

swipe the screen

400

I / go / to the doctor / last weekend

I had to go to the doctor last weekend.

400

Mr. Perez / say / sorry.

Mr. Perez doesn´t have to say sorry.

400

If babies _____ (to be) hungry, they ______ (to cry).

If babies are hungry, they cry.

400

Which animal is known as the ‘Ship of the Desert?

Camel

500

tecnología

technology

500

he / make / his bed

He has to make his bed.

500

he / work late / last night

He didn´t have to work late last night.

500

Water _____ (to boil) if you _____ (to heat) it to 100 °C.

Water boils if you heat it to 100 °C.

500

How many months of the year that has got 28 days?

all