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21. The city's complex transportation system includes subways, buses, and shared bikes As used in the sentence, "complex" most nearly means: A) Basic B) Complicated C) Separate D) Fast 22.During quarantine, people were forced to isolate themselves to prevent the spread of disease As used in the sentence, "isolate" most nearly means: A) Remove B) Join C) Separate D) Relocate 23. When the main road was closed, drivers had to find an alternative route to get to work. As used in the sentence, "alternative" most nearly means: A) Additional B) Dangerous C) Temporary D) Different 24.Her testimony seemed to contradict what the witness had previously stated. As used in the sentence, "contradict" most nearly means: A) Confirm B) Support C) Oppose D) Question 25.He tends to interrupt people when he's excited. As used in the sentence, "tendency" most nearly means: A) Talent B) Habit C) Opinion D) Plan