What _____________ if one day we suddenly had no fresh water on Earth?

• happened

• would happen

• will happen

• happens

I'll be really angry if Ann _____________ all the apples!!

• will eat

• would eat

• eats

• would have eaten

______________ you drink milk, your bones will be weak.

• As long as

• Unless

• In case

• Provided (that)

If you weren't well, I _______________ you.

• help

• will help

• helped

• would help

If Max ______________ a vet, he would have been a marine scientist instead.

• didn't become

• becomes

• hadn't become

• will become

"Second Conditional structure" is built...

• If+ Present Simple, Future Simple

• If+ Past Perfect, Conditonal + Present Perfect

• If+ Present Simple, Present Simple

• If+ Past Simple, Conditional form

If you ____________ the old newspapers, we could have sent them for recycling.

• hadn't thrown away

• don't throw away

• didn't throw away

• throw away

If you heat up an ice cube, ...

• it would melt

• it melts

• it would have melted

• it will melt

"Third Conditional structure" is built...

• If+ Present Simple, Present Simple

• If+ Past Perfect, Conditional + Present Perfect

• If+ Past Simple, Conditonal

• If+ Present Simple, Future

To express a possible result in the future, we use...

• Zero Conditional

• Third Conditional

• First Conditional

• Second Conditional