I wonder if a colony will ...... on Mars in the future. ESTABLISH or BE ESTABLISHED

I don't believe life ...... discovered on other planets in the near future. WILL BE or HAS BEEN

They won't show you the exams papers, _________ you ask to see them. PROVIDED THAT / UNLESS

Unfortunately, the ___________ of Amazonia has been happening at a fast pace. DEFORESTATION / DEFLORESTATION

Some politicians are so __________! DISHONEST / UNHONEST

We'll be glad to go to your party _____________ we can find a babysitter. PROVIDED THAT / UNLESS

Sending a crew to Mars is possible ... we can keep them safe. AS LONG AS or IN CASE

Space tourists may ... a lot of money to stay in a hotel on the moon. CHARGE or BE CHARGED

Travelling to Europe is _________ for me now. I am totally broke. INACCESSIBLE / UNACCESSIBLE

It is important to protect our indigenous population _________ they are part of our history. SINCE / UNLESS

Astronauts receive training ........ they have to deal with emergencies. IN CASE or UNLESS

____________ you study, you will not succeed. UNLESS / IN CASE

New forms of space travel may .... in the next few years. BE INVENTED or INVENT