In questions 1-5, the sentences contain one or two blanks; e…
In questions 1-5, the sentences contain one or two blanks; each blank indicates that a word or set of words has been left out. Below the sentence are five words or phrases. Select the word or set of words that best completes the sentence. One challenge of generating electricity from ocean waves is that wave power isn’t _______: it varies in unpredictable ways that pose technological and planning problems for electricity generation.