单项选择题

You should attempt to correct problems with your work computer ______ an IT expert cannot be reached for assistance in a timely fashion.

(A) only if
(B) so as
(C) rather than
(D) in order that
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单项选择题
To submit the change of address form, simply ______ the bottom portion from the rest of the page, sign it, and mail it to the address shown.
(A) gather
(B) enclose
(C) attach
(D) detach
单项选择题
Reports of problems with any of the machinery on the assembly line should be forwarded ______ to the maintenance department.
(A) directly
(B) openly
(C) strongly
(D) importantly
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