Many argue that the world will never make the switch ...

★ Subjunctives

Many argue that the world will never make the switch to cleaner forms of energy … easily obtainable soil sources remain.

A. suppose that

B. providing that

C. unless

D. as long as

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If Lucy’s car … down, she would be here right now.

A. didn’t break

B. hadn’t broken

C. wouldn’t have been

D. doesn’t break