The World Health Organization gave a warning to the public without any _____when the virus of H1N1 hit Mexico in April, 2009.
Mother promised she _____ me an English-Chinese dictionary.
She objects to _____ loud music _____ while she reads newspapers.
If it _____, we will go to visit the zoo.
Our English teacher _____ all the exercise books last Friday evening.
The bus came after I _____ for about half an hour.