—Have you heard that he was admitted into Beijing University?—Is that true? And I'm glad that his efforts at last ___．

--thank you for keeping me _________ of everything that’s happening.--Don’t mention it.

Usually a child’s behavior is a ________ of his family environment.

Rather than ________on a crowded bus, he always prefers _______a bicycle .

I hope I will not be called on in class as I am not yet ________prepared.