Nearly all educators believe that a chal...

While watching television，____． 

A．the doorbell rang                       B．the doorbell rings

C．we heard the doorbell ring                D．we heard the doorbell rings

I like getting up very early in summer. The morning air is so good____.

A．to breathe                             B．to be breathed

C．breathing                             D．being breathed

If you play with electricity，you may get an electric________.

A．strike            B．beat              C．shock            D．knock

---How about ______lecture you attended last night?

---It was too boring , indeed ,____lecture for me.

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

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,选项中有两个为多余选项。

— How can I help you?

—    1.   

— Would you like to send it surface or airmail?

—   2.  

— If you send the parcel with surface email, it will take about 2 months to arrive, whereas with airmail, it will arrive in one week or more.

— That’s a big difference. 3.　 How much will it cost to send it airmail?

— That depends on the weight. Place it on the scale, please.

— OK.

— That’s 300 grams.     4.   

— That’s not bad. I’ll do that then. Does that include insurance on the contents of the parcel or is that a separate payment?

—     5.  It’s another 5 pounds.

— OK.

A．I suppose airmail will be much more expensive.

B．I want to buy some stamps.

C．I’d like to send this package to China.

D．That’s separate.

E. That’s all right.

F. What’s the difference between surface and airmail?

G. It will cost 10 pounds for airmail.