your father needs to worry about your school work if you don't work hard.(保持句子原意)it( )( )( )your father to worry about your school work if you don't work hard.
问题描述:
your father needs to worry about your school work if you don't work hard.(保持句子原意)
it( )( )( )your father to worry about your school work if you don't work hard.
答
is necessary for