Ever since my childhood, I have dreamed of ______ a heavy snow in my hometown in winter.
When I knew Mary made every effort ______ the homeless, I could not but ______ her.
About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
— Have you thought of a theme for your poster yet? — No, I ______ a lot about it, but I haven’t decided.
______ left before the deadline, it doesn’t seem likely that John will finish the job.
Medical ______ shows that men are more likely to have heart attacks than women.