次の英文には,1箇所だけ文法・語法上明らかに誤っている箇所がある。一つ選び,番号で答えよ。
( 1 According to) recent research, there seem to be ( 2 much) more problems ( 3 surrounding ) young childr in our society than there ( 4 used to be).
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize