China has invested 15.2 billion yuan so far this year to support pig keepers, in a(n) _______ to ensure enough pig supplies.
The pilot asked all the passengers on board to remain ______ as the plane was making a landing.
Five people were reported ________ in the accident.
I felt it an honor _______ to speak here.
Bears often hide themselves in places ________ can’t be found by hunters.
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