4 . —What are you doing, dear?

—I’m watching the football game.

—What? You __________ have done your homework first. (用适当的词填空)

5 . Since you have made such good preparations, there __________ not be any problem about passing the coming exam. (用适当的词填空)

6 . You can’t imagine that a well-behaved gentleman __________ be so rude to a lady. (用适当的词填空)

7 . You ____________ not eat too much meat. These drugs remain in the meat, so they do no good to our health. (用适当的词填空)

8 . In my opinion, you __________ eat more meat because it contains lots of vitamins and minerals not found in vegetables. (用适当的词填空)