6. This summer, we can ____ thirty books from the library and return them by Wednesday, September 16. (A)check out (B)check in (C)put away (D)rent

12. When children talk back, it can be very rude. If parents or teachers don’t do anything about that, it can become a bad habit. ____, rude kids often become rude adults. (A)Better yet (B)Nevertheless (C)What’s worse (D)On the contrary