Cada pregunta de este test está cronometrada.
They often listen to music.
Active
Passive
She is reading the newspaper now.
These cars are produced in Japan.
Alan teaches geography.
German is spoken in Austria.
Lots of houses were destroyed by the earthquake in 1906.
Henry Ford invented the assembly line.
The bus driver was hurt yesterday.
You should open your workbooks.
Houses have been built.
Do ❌
Test ❌
❌ a hypotesis. Make a discovery.
❌ results, an experiment, a reaction.
❌ protecting clothing.
Chemists wear protective clothes wear protective clothing wear pratective clothes( wear protective clothes, wear protective clothing, wear pratective clothes ) when doing experiments.
Biologists check the results checking the results to check the results( check the results, checking the results, to check the results ) of their experiments by repeating them
Chemists watch reactions observe reactions look to reaction( watch reactions, observe reactions, look to reaction ) when they mix.
Scientists make a hypothesy make a hypothesizes make a hypothesis( make a hypothesy, make a hypothesizes, make a hypothesis ) after observation.
A biologist do experiments make a hypothesis does experiments( do experiments, make a hypothesis, does experiments ) with cells.
