请教两个英语题~

题目

请教两个英语题~
简要解释一下吧
1.__our factory is to maintain its relationships with our retailers,we must increase production.
A How B Until C If D As if
2.Organic Generation was a supermarket that__on carrying only certifiably organic products.
A insist B insisting C insistent D insisted

答案

C如果要与我们的零售商继续合作,那么我们就必须则家生产量.
A insist 前省略了should