单选题 I am afraid I won't have any influence over my 18-year-old daughter ______ her mind is made up.
【正确答案】 C
【答案解析】词义辨析题。根据句意,C为正确答案。at the moment“在当时”;in order that“为了”;once“一旦……就”;because“因为”。句意:一旦我女儿下定了决心,我恐怕就不会对她有多大影响了。