His mother _______ since his father ___________.

To avoid ________ the same mistake, what should I do—You’re supposed to copy the mistake twenty times.

What do you think of the restaurant you go last night—I think it’s _______restaurant in town . The service was really bad.

依次填入下列一段文字空白处的词语，最恰当的一组是（ ）谈到小说的未来，我们 ①感到困惑。 ②，信息革命使小说成为精英，创造了一种个人署名、出版社出版的模式。 ③，这种模式正受到极大的挑战。今后的小说是不是 ④像以前那样个人署名， ⑤由出版社提供版税或稿费这种情况能维持多久，在多大程度上能够延续下去， ⑥不是一个疑问。

I really don’t know for certain____ they discussed.this important event very secretly.