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Correct Answer: C) That.
Correct Answer: D) Who.
Correct Answer: A) Defining Relative Clause.
Correct Answer: B) Test.
Correct Answer: C) Who.
Correct Answer: C) Whose.
Correct Answer: A) Whose.
Correct Answer: A) Scarlett Johansson, who plays "The black widow" in The Avengers saga, is an actress.
Correct Answer: B) Who.
Correct Answer: B) Which.
Correct Answer: C) My boss, who is very nice, is always late.
Correct Answer: A) Non-defining.
Correct Answer: D) Recommend.
Correct Answer: A) Everything is ok here.
Correct Answer: C) Where.
Correct Answer: A) Defining.
Correct Answer: C) Which.
Correct Answer: B) Where.
Correct Answer: A) Who.
Correct Answer: C) , which.
Correct Answer: B) Incorrect.
Correct Answer: C) , who lives in Houston, is a doctor.
Correct Answer: C) Al Gore, who gave a long and boring speech, won the Nobel Prize.