This kind of bird is ___________ , and we should do what we can to it.
—Tom, I hope you won’t make the mistake later.—I swear I won’t. You know __________________.
When we got to there, the host _____ his speech and the performance __________.
I will do my best to get it for you ______ I could remember who last borrowed it.
I apologize if I __________ you, but I assure you it was unintentional.
—Your sister nearly _______ all her spare time to her study during the three years. —That's right, or she ________ the first place in her school in the examination.