You shouldn’t have the machines ______ all the while. You ought to have them ______ now and then.
A.run; repair | B.running; repairing | C.run; repaired | D.running; repaired |
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You shouldn’t have the machines ______ all the while. You ought to have them ______ now and then.
A.run; repair | B.running; repairing | C.run; repaired | D.running; repaired |