Dave's ESL Cafe's Student Discussion Forums

[puzzle]

Dear teacher,
Here is a question like this:
After the new technique was ______ , the factory produced twice as many tractors in 1988 as the year before.
" A. introduced into " is the answer.
Can you tell me if the "into" is necessary here?
Thank you!

[myprofe]

"Into" is unnecessary and if it is followed by a comma, as you have written it, it would be incorrect.
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