题目

medical, communication, welfare, behave, nest, achieve, rate, explain, condition, worthwhile 1 The heavy snow prevented  _________ with the outside world for three days. 2 I hope my kids will _________ themselves while I am away. 3 Only by working hard can you _________ you goal in time. 4 The reason Peter _______ to us for his lateness was unreasonable. 5 It cost me a lot to travel around the world, but it was really ________, for it broadened my views. 6 That secondhand car in perfect ________ went well. 7 Most people walk at an average ________ of 5 kilometers an hour. 8 Birds often make their _________ in trees. 9 They would rather work than live on _________. 10 She attended a _________ school before becoming a physician. 答案：1 communication  2 behave  3 achieve  4 explained  5 worthwhile  6 condition  7 rate  8 nests  9 welfare  10 medical 

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