— Has James finished his report on his Enquiry Learning yet?

— I'm not sure. She _____ on it last week. [ ]

A. was working

B. has worked

C. worked

D. had worked

既希望较快地查找，又便于线性表动态变化的查找方法是______。

A．顺序查找
B．折半查找
C．Hash查找
D．索引顺序查找