1 . This is proof ______ dreams dream big and dreams do come true. (用适当的词填空)

2 . Moreover, there is growing concern that we might fall victim to this technology, as there are cases in which hackers have broken into facial recognition systems by using people’s social media photos to build models of their faces. （英译汉）

3 . 毫无疑问，她是一名优秀的学生。
____________ she is an excellent student.

4 . At first, Xie Lei had no idea what she should say, but what surprised her was that she found herself speaking up in class after just a few weeks. (英译汉)