Scientists generally agree that the earth's climate will warm up over the next 50 to 100 years ________ it has warmed in the 20 000 years since Ice Age.

1. A.
   so long as
2. B.
   as much as
3. C.
   as long as
4. D.
   as well as

Scientists generally agree that the Earth’s climate will warm up over the next 50 to 100 years _______ it has warmed in the 20,000 years since the Ice Age.

  A. as long as      B. as much as         C. as far as            D. as well as

Scientists generally agree that the earth's climate will warm up over the next 50 to 100 years ________ it has warmed in the 20 000 years since Ice Age.

[　　]

Scientists generally agree that earth’s climate will warm up over the next 50 to100 years______ it has warmed in the 20,000 years since Ice Age.

A. so long as.  B. as much as   C  as long as.  D  as well as

Scientists generally agree that earth’s climate will warm up over the next 50 to 100 years______ it has warmed in the 20,000 years since Ice Age.

A. so long as.  B. as much as   C  as long as.  D  as well as