1) headphones a) this is b) these are 2) digital camera a) this is b) these are 3) laptop a) this is b) these are 4) lights a) this is b) these are 5) microphone a) this is b) these are 6) mobile phone a) this is b) these are 7) projector a) this is b) these are 8) screen a) this is b) these are 9) speakers a) this is b) these are 10) video camera a) this is b) these are

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