答案:C
设在关系模式R(A,B,C,D,E,F,G)中,根据语义有如下函数依赖集F=A→*B,C→D,C→F,(A,D) → E,(E,F)→G。关系模式R的码是 【18】 。
Laura is going to surf on the Internet as soon as she ______ her homework. [ ]
A. will finish
B. finishes
C. finished
D. is finishing