I saw Helen at the party last month. It a year since we met last time.A. wasB. isC. has b

问题补充：

I saw Helen at the party last month. It a year since we met last time.

A. was

B. is

C. has been

D. would be

答案：

(答案→)A. was

B. is

C. has been

D. would be

解析：句意：上个月我在舞会上看见Helen了。从上一次我们见面，到上个月在聚会上看见她，已经有一年的时间了。句型‘It is/has been /was+时间段+since+一般过去时’为固定用法。但是主句的动作也已经发生了。所以要用过去时不涉及现在。故选A。

考点:考查It句型的用法。