Solved IB ACIO Question
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Q · Time and TenseMedium · 45s
Directions:- Find out the Error in each of the following sentences, if any. If there is no error, your answer is “D”: Water contamination has become (A) more serious (B)since chemists have begun to use new substances. (C) No Error (D)
TopicTime and Tense
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Use ‘began’ instead of ‘have began’.
Final Answer: Option C - since chemists have begun to use new substances