When we are in the library, we should_______ [kiːp] quiet.
—— It was great fun to be a volunteer, wasn't it?—— Yes. That's experience hard to forget.
—Would you please tell me________this DV?—Yes.It’s very easy.
—Would you like to tell me________?—Sure.Practice makes perfect.
The mountain was________steep________few people in our city reached the top.
Don’t________your dream.I’m sure your dream will come true one day.