In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
Although his brother is blind, he is very fast _____ calculations.
Correct option - 3
Here, the adjective fast is followed by preposition at, as a specific action (calculation) is being discussed. Thus, option 3 i.e.at is the correct answer.
Correct sentence - Although his brother is blind, he is very fast at calculations.
2. What is the active/passive of - You surprise me.