Essential or non-essential? Commas with appositives and clauses

Question 1

Is this sentence correct in formal written English? Mount Everest the highest mountain on Earth is on the border of Nepal and China.

• A. correct
• B. incorrect

Question 2

Which option completes the sentence correctly? Students ___ must see the nurse.

• A. who feel unwell
• B. , who feel unwell,

Question 3

Is this sentence correct in formal written English? Our head teacher Mrs Okafor retires in July.

• A. correct
• B. incorrect

Question 4

Which option completes the sentence correctly? The athlete ___ broke the record.

• A. who trained in the mountains
• B. , who trained in the mountains,

Question 5

Is this sentence correct in formal written English? Students, who feel unwell, must see the nurse.

• A. correct
• B. incorrect

Question 6

Which option completes the sentence correctly? The song ___ became a hit.

• A. , "Blue Lights,"
• B. "Blue Lights"

Question 7

Is this sentence correct in formal written English? The film, that we saw last night, was filmed in Iceland.

• A. correct
• B. incorrect

Question 8

Which option completes the sentence correctly? Paris ___ attracts millions of visitors.

• A. which is the capital of France
• B. , which is the capital of France,

Question 9

Is this sentence correct in formal written English? Students, who feel unwell, must see the nurse.

• A. correct
• B. incorrect

Question 10

Which option completes the sentence correctly? (I have only one brother.) My brother ___ is a chef.

• A. Sam
• B. , Sam,

Question 11

Is this sentence correct in formal written English? Students who feel unwell must see the nurse.

• A. correct
• B. incorrect

Question 12

Which option completes the sentence correctly? The song ___ became a hit.

• A. , "Blue Lights,"
• B. "Blue Lights"

Question 13

Is this sentence correct in formal written English? The film that we saw last night was filmed in Iceland.

• A. correct
• B. incorrect

Question 14

Which option completes the sentence correctly? Mount Everest ___ is on the border of Nepal and China.

• A. the highest mountain on Earth
• B. , the highest mountain on Earth,

Question 15

Is this sentence correct in formal written English? The film, that we saw last night, was filmed in Iceland.

• A. correct
• B. incorrect

Question 16

Which option completes the sentence correctly? (I have only one brother.) My brother ___ is a chef.

• A. Sam
• B. , Sam,