Dreye權威釋義|unless

unless

KK:[ʌnˈlɛs] DJ:[ǝnˈlеs]

權威釋義

閱讀Part1

The copy machine will guarantee reliable, quality service to the user, ________ regular maintenance work is performed once a month.

(A) in order that

(B) in case

(D) unless

對答案