一、从A、B、 C、D选项中选出填入空白处的最佳选项。
1. Andy had quit her job when her son was born _______ she could stay home and raise her family.
A .now that B. as if C. so that D. only if
2. David need to learn French ______ his company is opening a branch in Paris.
A. unless B until C although D since
