The boy sitting by the window is the only one of the students who _______ from the countryside in our school.
I looked under ______ bed and found _____ book I lost last week.
--- How long are you staying? --- I don’t know. _____.
It is reported that large amounts of locusts(蝗虫) _____ in their activity in the north now.
The actor pretends to be a fierce, bold man, but _____ he is timid and shy.
_____ makes that teacher famous is _____ over 92% of his students have been admitted to the state universities.