各基础电信运营企业作为国家应急通信保障任务的（）承担单位，负责组织落实本企业的应急通信保障工作
A.次要
B.主要
C.重要
D.必要
参考答案：B
Read and write. 用单词的适当形式填空。
1. I'm ____ (come).
2. My little brother____ (watch) TV every day.
3. Thanks for____ (teach) us English.
4. We ____ (play) football yesterday.
5. There are many____ (bus) in the street.
6. What____ (do) the girl do last night?
7. Zhang Wei is____ (a) English teacher.
8. What did she____ (have) for lunch?
9. Lily and Lucy____ (have) fish yesterday.
10. I've____ (get) an email from Lingling.
资本原始积累在历史上最著名的城市是（）。
A.美国
B.法国
C.日本
D.英国
