叙述ARASHH0198的信号流？

从方框中选择合适的单词，并用其正确形式填空。

    Jane is my good friend. She 1             from Canada. She speaks 2            . We are in the same class.

Many students in our class like English 3            , but I don't like it at all. My English is 4           , so she

often helps me 5            it. And I help her study Chinese. We help each other.

下列的常量中，合法的是

A．12．

B．-20

C．1，000

D．4 5 6

Mike, with his friends _______ in Beijing now. [ ]

A. am

B. be

C. are

D. is

消费者协会是国家为了保护消费者权益而依法成立的对商品和服务进行监督的行政机关。（）