土问：the staff谓语应该用单数还是复数阿？

和 cattle一样，强调整体的时候用单数，强调整体中的个体的时候用复数。

the staff are all good GMAT takers. (OK)

the staff is all good GMAT takers.(not ok)

the staff has been credited with "good service". (OK)

the staff have been credited with "good service". (not ok)