Although he talked half an hour, he couldn't give us a good ________ of the reason why he did it.
Will all those _____ the proposal raise their hands?
[注释]
He looked rather untidy as there were two buttons _____ from his coat.
Dress warmly, _____ you'll catch cold.
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Although John was the eldest in the family, he always let his sister _____ charge of the house.