English Grammar Cloze Test
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8. Alternative sources of electrical energy ---- around the world to face the challenges of the 21st century, but new sources of power ---- new levels of protection. A) could have been harnessed / can require B) are harnessed / will be required C) will have been harnessed / should require D) are being harnessed / require E) must be harnessed / required
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Hi Ecrin, let's look at this English language question together to find the most appropriate verb forms.
Analyzing the Sentence
The sentence discusses current global efforts to address 21st-century energy challenges. Let's look at the first blank.
Alternative sources of electrical energy (blank) around the world.
Since these efforts are ongoing, the present continuous passive tense is the best fit. This gives us are being harnessed.
Alternative sources of electrical energy are being harnessed around the world.
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