注意：此页面搜索的是所有试题
题目内容
（大连工业大学-大学英语3）
(单选题) Since last century，his family ______teachers.(本题3.5分)
A、 are
B、 are being
C、 have been
D、 were being
A、 are
B、 are being
C、 have been
D、 were being
参考答案