1. 시험 삼아라며 수지가 입혀줘서... 2. 남자친구한테도 보여주라고 해서... In writing, these should be 2 separate sentences, even if in conversation you can say in one. For example, because Suji helped me put on (these clothes), saying it is like a test (trying to wear to see if her boyfriend likes them or not), (I tried them on). Because she also said, "Show them to your boyfriend", (I tried them on). () are implied statements, for instance.