of her spare time ______ , she still kept on her research in the library.

I’m sure I _____ her four years ago.

It must be very ______ to watch a close game between the two basketball teams.

下列各组句子中，加点词的意义和用法相同的一组是（ ）

______ made things worse, Peter said, was that his parents stopped supporting him in developing the “flying car”.