Scientists believe Native Americans arrived by crossing the land bridge that connected Siberia and _________ more than 10 000 years ago.?

A.this is Alaska             B.Alaska is now?

C.is now Alaska            D.what is now Alaska?

Scientists believe native Americans arrived by crossing the land bridge that connected Siberia and _______ more than 10,000 years ago.
A. this is Alaska      B. Alaska is now
C. is now Alike        D. what is now Alaska

Scientists believe Native Americans arrived by crossing the land bridge that connected Siberia and _________ more than 10 000 years ago.

1. A.
   this is Alaska
2. B.
   Alaska is now
3. C.
   is now Alaska
4. D.
   what is now Alaska

Scientists believe native Americans arrived by crossing the land bridge that connected Siberia(西伯利亞)and         more than 10，000 years ago．

A. this is Alaska    B. Alaska is now   C. is now Alaska  D. what is now Alaska