补全对话，每空一词。

A: I went     1     with my friends by car yesterday.

B: That     2      interesting.

A: When we came     3     , my car didn't work, and we     4       to walk home.

B: When     5      you come home?

A: At about 10:00 at night.

1._______2._______3._______4._______5._______

站内移频化下行正线中心频率采用（）Hz。

A.550

B.650

C.750

D.850