注意：此页面搜索的是所有试题
题目内容
（石家庄铁道大学-大学英语3）
The boy ______ . Spanish for six years by the time he takes his examination.
A、 has studies
B、 will have studied
C、 has been studying
D、 had studied
A、 has studies
B、 will have studied
C、 has been studying
D、 had studied
参考答案