Use the correct form of the words in the boxes to complete the sentences in each group below. You may use some of the words more than once. In some cases, more than one word may be correct Từ để chọn: attempt effort trial experiment 1 It takes a lot o f ________________________ and patience to learn how to play a musical instrument. 2 John’s case came to ________________________ and in the end he was found innocent. 3 The athlete failed in his last________________________ to break the world record. 4 Many cosmetic companies claim they don’t carry o ut________________________ on animals. 5 I worked for the company for a(n )________________________ period of two weeks before I was fully employed.

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