The machine suddenly stopped _____ (work) because of the power cut. 2. The interview is very ________(success), so you will get a chance to work for the famous software company. 3. The new machine ought to ________ (test) before it is put to use. 4 . I’m afraid there is not much ________ (differ) in their points of view. 5 They fully recognized the enormous ________(strong) and influence of the union.