3D printers are still _____ expensive for most of us ______ afford.
________ are crazy about listening to pop music in their spare time.
Would More and more couples rather _______a second baby ______their first child can feel less lonely?
—What else did Tina ask you about the trip to Nanjing? —She asked me ______.
Jack is dishonest. He always________some excuses for doing something wrong.
—I really can't believe such a learned man has made so silly a mistake. — Don't you know_______ sense is worth more than knowledge?