Multiple choice

Laboratory tests revealed [a]/that the metal using in[b]/ this particular model[c]/ was actually an alloy of inferior quality.[d]

  1. a

  2. b

  3. c

  4. d

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The phrase should be 'the metal used in' rather than 'the metal using in', as the metal is being acted upon (passive voice). Option B correctly identifies the error.