.In the country area about one in ten ______ have enough to eat.
His father, who is said to be teaching in Australia, ____ in Nanjing University for more than 10 years.
—— Oh, it’s raining hard outside. Mum, do you think the milkman will come? —— Of course. He will come on time _____it rains.
Though the book is a little expensive, it is _____.
It is required that students _____mobile phones at school, so seldom _____them using one.
——Tom is never late for work. Why is he absent today? —— Something _____to him.