The World Health Organization gave a warning to the public without any ______when the virus of H1N1 hit Mexico in April, 2009.
According to news reports, personal ____ of guns in the USA causes a lot of trouble.
---Did you go to the cinema last night? ---Well, I had ____ to , but it was raining too hard.
Sorry, we are late,--our plane was _____ because of the heavy rain.
Mathilde and her husband turned the whole room upside down ________ the lost necklace.
________ the help of her teacher, Mary ________ in the past few months.