There is evidence that DHA plays a big role in the intellectual development of humans. In one study, doctors measured the DHA levels of mothers at the time they __56___. Their children were then tested at 12 and 18 months of age to see how well they __57___ things around them. The research team compiled data on __58___ each child focused on a toy. The toddlers ___59__ mothers had the highest DHA levels at birth showed the greatest attention spans. These children focused for longer periods and spent much less time simply ___60__, unfocused. 【題組】58. (A) how long (B) how longer (C) how much long (D) how long of
寫作批改
VIP與詳解卡管理
私人筆記( 0 )