–I ______ know you can play the piano so well. --Thank you. A. didn’t B. don’t C. can’t
—How often do I need to feed the fish? -They _______ food every day, or they will be hungry.
I’ll give a talk tomorrow. I’m thinking about _______.
The shoes are neither cheap nor comfortable, I can’t understand _______women like buying them .
—Would you mind lending me your bike? —_______.
Those are my twin sisters. _______ of them are interested in soap operas.