will become, If space debris continues to accumulate, it ______ (become) harder to launch new satellites., will use, If ClearSpace-1 succeeds in its mission, scientists ______ (use) similar technology in the future., will create, If satellites crash into each other, they ______ (create) more debris., will be, If engineers do not find a solution, space exploration ______ (be) at risk., cooperate, If countries ______ (cooperate), they will be able to clean up space faster., had designed / wouldn’t have had, If engineers ______ (design) satellites differently in the past, we ______ (not have) so much space junk today., hadn’t happened / would have been, If the 2009 collision ______ (not happen), there ______ (be) fewer debris in orbit., had prepared / could have avoided, If astronauts ______ (prepare) better, they ______ (avoid) space debris threats., had launched / would have helped, If ClearSpace-1 ______ (launch) earlier, it ______ (help) reduce space junk by now., had taken / wouldn’t be, If space agencies ______ (take) action sooner, space ________ (be) so polluted..

Conditionals Exercises

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