Barbara has worked here for three years, so I’m sure she’s quite to the task.
A. equal
B. fair
C. worth
D. informal
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(答案→)A. equal
B. fair
C. worth
D. informal
解析:A.equal平等的,胜任的,B.fair公平的,C.worth值得的,D.informal非正式的,句意:芭芭拉在这儿工作了三年,所以我确信她能够胜任这个工作。所以选A。