—I’m sorry I didn’t make it to your party last night.—_______, I know you’re busy these days.
17.I don’t think he was happy although he lived in a rich family, _______?
16.In our village, about 1,000 meters north of my house, stands an old temple _______ the 17th century.
15.You may ________ the textbook if you don’t know the answer to the question.
14.Jim insisted that the book Mr. Black referred to ________.
13.Being a good listener is a kind of quality and that’s ________ it takes to keep friendship.