Ithickitisnecessaryformy19-year-oldsontohavehisownmobilephone,forIsometimeswanttomakesureifhe——homefordinner.——处选择AcomeBcomesChascomeDwillcome

Question

I thick it is necessary for my 19-year-old son to have his own mobile phone,for I sometimes want to make sure if he—— home for dinner.
——处选择A come B comes C has come D will come

Answer 1

D——由if引导的宾语从句,主句用一般时态（ I sometimes want to make sure ）,从句用将来时表示.