---What do you think Sam in 10 years?　　　-A doctor.　　A. will beB. isC. wantsD. is being

问题补充：

---What do you think Sam in 10 years?

---A doctor.

A. will be

B. is

C. wants

D. is being

答案：

(答案→)A. will be

B. is

C. wants

D. is being

解析：考查将来时态。由时间状语in 10 years 可知本句用一般将来时态“故选A。