这所房子曾经属于我的祖父。

This house ___once belonged to my grandfather.

现在的电脑比它们曾经便宜得多。

Computers are much cheaper nowadays than they ___once were.

我曾经去过英格兰，并且我喜欢那里的服装风格。

I ___once went to England and I love the style of the clothes there.