10/01/27 12:00:38 N34WMHIg0
>>390
まず、there have been suggestions.で第1文型で文のメインの要素は終了
thatはsuggestionsと同格で、that以下に完全文が来る
that以下の文をわかりやすくばらせば
the growth of the brains of children is not steady,
but the growth of the brains of children occurs suddenly.
だから空欄にisを入れると文と文が接続詞なしで繋がってしまうので誤り