单项选择题
A.sulphur;walnut;urea B.sulphur;urea;walnut C.urea;sulphur;walnut D.walnut;urea;sulphur
A.meet B.get C.meeting D.getting
A.credit;dry weight customs declaration form B.draft;credit;customs declaration form C.customs declaration form;draft;credit D.credit;customs declaration form;draft