David: Hi, Linda, what are you doing?
Linda: Hi, David．I  （prepare） for the test tomorrow．
David: But   are you sitting here in the garden?
Linda: Well, the library is full and the classroom is too noisy． Are you ready  the test ?l
David: I am afraid not．I feel very nervous． We don't have much time    （leave）．
Linda: We can prepare together． Maybe that can help．
David: Good idea． How many units will be included in     coming test?
Linda: Three altogether． They are Unit 4,Unit5 and Unit 6．
David: Really? I  （think） Unit 6 would not be covered．
Linda: It is included   it is only partly finished by our teacher． Now let's ask each other questions．You go first．
David: All right．Please name three European countries．
Linda: It's easy． France, Germany and Russia．I  even say more．
David: It seems you are    （well） prepared than me． Now it's   turn to ask me questions．
Linda: OK． What are the seven continents of the world?
David: Asia, Europe, Africa, and err．．．．I really can't remember them all．
Linda: Don't worry． You still have some time today to prepare．