At the present moment,only full cash payment ____ delivery is accepted for products ordered from SunTanny.A.out of B.within C.upon D.from 为什么呢?还有整句意思?

at the present at the present at present 与 for the present 区别 Treasures at present the person Forget the past ,teasure the momen at the present time与at present 的区别 at the present time ,at present ,now的区别` at the present time 和at present一个意思吗 He is doing his homework at the momen.(对划线部分提问)换线部分是doing his homework at the moment & now & at present 是什么? in the present和at present有什么区别 in the present,at the present分别为什么意思?还有：in the present,at present,at the present这三个短语有什么区别?做题时应如何选择呢? ___I saw him,I knew what had happened.A.At the moment B.For the momen C.The moment D.For a momet at present=at the present time是否成立?还是at present=in the present time?那in the present time呢 at now等于at the moment 等于at present么 in the present ,at the present,in the presence,at the presence的区别 at present the police -----（search） the thief at the present