We need to get to the root of the problem______ we can solve it.
On hearing the sound, the birds flew away in every ________.
Punishments became more severe(严厉的), but he remained _________, that is to say, nothing could change his mind.
You’d better ________a few hours to practice your spoken English, which you can learn from.
One of my friends is ___ leader of his department, which is playing ____ important part in the company.
— My car is broken. Would you mind lending me your car this afternoon? — Not at all. _______.