at present there must be nothing we can do to prevent the juvenile crimes怎么不用something that we can do和something which we can do

at present there is no internet connection present at the moment! There were 200 people present at the meeting.本句可改为：1、There were 200 people to be present at the meeting.2、There were 200 people being present at the meeting.这两种句形吗?如果不可以为什么? 用at present造句, at present怎么发音? at the present at present怎么读 at the present 用at present 造句 用at present造句 at present是什么意思 at present的同义词 be present at意思+++++++++++++ at present是什么意思? at present 同义短语 At present ,there is only one thing can make me happy 什么意思? ________ me,there are many other students present at the meetingA.BesidesB.BesideC.ExpectD.Except 改错题：i think there must be another man talks with john at present.RT