. I feel it an honour __________ to speak here.
I often read China Daily, ____of great help to my English study.
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.