Questões de Orações condicionais | Conditional Clauses (Inglês)

“Unless” in “unless it can stake a stronger claim to supporting improvement” (7^th paragraph) introduces a(n)

What is the best alternative to fill the gaps to complete this conditional sentence?

“Until cybersecurity shortcoming ______ addressed, federal and critical infrastructure IT systems _______ increasingly susceptible to cyber threats.”

What is the BEST alternative to fill the gaps to complete this conditional sentence? 

Choose the conditional sentence that correctly summarizes the text.

In the fragment of paragraph 6 “If all Arizona houses were to increase air conditioning use”, if signals a(n)

The passage “we can take much of the climate burden from our children’s shoulders if we limit warming to 1.5C by phasing out fossil fuel use” (lines 56-59) contains a