[单项选择]Passage Two I’ve often felt that “step-parent” is a label we attach to men and women who marry into families where children already exist, for the simple reason that we need to call them something. It is most certainly an enormous “step”, but one doesn’t often feel as if the term “parent” truly applies. At least that’s how I used to feel about being a step-mother to my husband’s four children. My husband and I had been together for six years, and with him I had watched as his young children become young teenagers. Although they lived primarily with their mother, they spent a lot of time with us as well. Over the years, we all learned to adjust, to become more comfortable with each other, and to adapt to our new family arrangements. We enjoyed vacations together, ate family meals, worked on homework, played baseball, rented videos. However, I continued to feel somewhat like an outsider, invading foreign territory. There was a definite boundary line that could not be crosse
A. She had unintentionally made Margo uncomfortable.
B. She had never communicated with Margo in such way.
C. She pretended to be Margo’s father when chatting with her.
D. She did not explain that it was she who was writing to Margo.