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 It will be many years _____ he turns ______engineer.

A. that; an     B. when; a      C. until; \    D. before; \

It will be some time _____ they know the final resutls.

[　　]

A．when　　　　B．before　　　　C．that　　　　D．until

How long do you think        Obama officially takes office in the White House?

A. it will be that       B. will it be until      C. will it be when      D. it will be before

 How long do you think??????_________Obama officially takes office in the White House?

A. it will be that       B. will it be until 

C. will it be when      D. it will be before 

.How long do you think______ the construction company finishes the project?

A. it will be before    B. will it be until   C. will it be when     D. it will be that