The teachers are supposed to teach us about “safe sex” but most of them are too________.

——Which of the two books do you want?—— I want ____. Please show me       .

Your niece is very strict and ______ worth teaching, but your nephew is not. Look, he is now ______ asleep in class.

Don’t forget to bring a dictionary next class. ___. I didn’t catch what you said.

.Mr. White has been invited to the celebration _________ tomorrow afternoon.