Ithinkitisnecessaryformy19-year-oldsontohavehisownmobil...

问题详情：

I think 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.

             s                        come                      come

【回答】

D

知识点：动词时态与语态

题型：选择题