since he left his hometown.A. Ten years went byB. Ten years has passedC. It is ten years a

问题补充：

since he left his hometown.

A. Ten years went by

B. Ten years has passed

C. It is ten years ago

D. There are ten years

答案：

A. Ten years went by

(答案→)B. Ten years has passed

C. It is ten years ago

D. There are ten years

解析：考查时态。since“自从”，后跟含一般过去时的句子常与现在完成时连用。句意“自从他离开家乡以来，已经过去十年了。”故选B。