1 . People complain that decisions to approve or ________(否认；否定) a permit are often arbitrary. (根据汉语提示单词拼写)

2 . Since it will be rainy tomorrow, we have to _________ (选择)a different time to go jogging.   (根据汉语提示单词拼写)

3 . John will have to run very fast to_________ (打破) the school 100-meter race record in the sports meeting.   (根据汉语提示单词拼写)

4 . We must work hard to ________ (习得) a good knowledge of English. （根据汉语提示单词拼写）

5 . Students should be ready to explain and ________(为……辩护) their views. （根据汉语提示单词拼写）