Question

【题目】It seven years the panda had her first baby panda.

A. was， since B. is， after

C. was， after D. has been， since

Answer 1

【答案】D

【解析】

试题分析：句意：自大熊猫生了她的第一只熊猫宝宝已经七年了。It has been + 一段时间 + since从句。是一个固定句型。所以选D。