Question

Fill in the blank with a suitable option:
Where the pilot finally managed to land _______________.

• A. Is not known
• B. Nobody knows
• C. We don't know
• D. Nobody knew

Answer 1

Answer: (A)

Is not known

Complex sentences have subordinate clauses which contain a verb, here "is". The tense in this case should be present. Hence, option A is correct. The rest of the options do not fit this description, hence, incorrect.