As is known to all, the work of a teacher, which is demanding, requires _________ care and patience.
Anyone, once ____ positive for H7N9 flu virus, will receive free medical treatment from our government.
Evidence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.
I must find out why____so many students made the same mistake.
It was announced that only when the fire was under control to return to their homes.
Mum is coming. What present for your birthday?