My uncle promised to buy me a nice gift ...

Most scientists seem to agree that _______ certain limit should be set on _______consumption of cars to ease air pollution．

A．a; the               B．/;the            C．the; /           D．the; the

根据对话情景和内容，从对话后所给的选项中选出能填入每一空白处的最佳选项，并在答题卡上将该选项涂黑。选项中有两个为多余选项。

Jack: How do you keep in touch with your aunt in America?

Emma: Oh．I make a phone call once a month．

Jack:   6

Emma: Yeah．

Jack:   7

Emma: I have never thought of it．Is it convenient and cheap?

Jack: Sure． 8

Emma: Oh? It may be wonderful to send e-mails through the Internet．

Jack: Yes．In addition, you can make a phone call through the Internet, too．

Emma: Really?    9   But I don't know how to get access to the Internet．Could you show me?

Jack:    10   ．I'll show you．

Emma: I appreciate it very much．．

A．No problem．

B．I'm so glad to hear that．

C．It's very expensive, right?

D．No wonder it's so popular．

E．Why not send e-mails through the Internet?

F．Do you know how to send e-mails through the Internet?

G．You can send e-mails to each other every day through the Internet

comb          A．habit          B．debt           C．substance       D．above

custom        A．measure        B．upstairs       C．respect         D．sugar

salt          A．almost         B．calm           C．chalk           D．half