【题目】______ worries me that my daughter plays with her cellphone for a long time every day.
A． It B． What C． This D． That
在线课程【答案】A
【解析】代词it作形式主语代替真正主语，真正主语被后置。主语是从句，我的女儿每天都和手机玩很长时间（“my daughter plays with her cellphone for a long time every day”）。句意：我的女儿每天都和手机玩很长时间，这让我担心。