Question
Preserve (A) down your smartphone at night wonrsquo;t
help powering (B) the battery, since it's using (C) that you would be unlikely (D) the device at that time.Solution
Here, A is incorrect at its place. Preserving down the smartphone wonrsquo;t make sense, but powering down a smartphone makes sense. Hence, A-B can be exchanged. Also, C and D are incorrect at their places. They can also be exchanged to get a meaningful sentence. Powering down your smartphone at night wonrsquo;t help preserve the battery, since it's unlikely that you would be using the device at that time.
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