Some old people don’t like pop songs because they can’t _____so much noise
My dictionary has disappeared. Who ________ have taken it?
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.