we start thinking and believing we can do it anything is possible.A. SinceB. WhileC. Unt

问题补充：

we start thinking and believing we can do it, anything is possible.

A. Since

B. While

C. Until

D. Once

答案：

A. Since

B. While

C. Until

(答案→)D. Once

解析：考查连词辨析。Since 因为，自从 while 当……时候；然而 until指导 once 一次，一旦

句意为一旦我们开始思考并且相信我们能做到，任何事情都是可能的。