While Helen _____ along the river after supper, she ____ a wallet lying on the roadside.

There is no possibility ______ all the students can pass the college entrance examination.

I was tired out, so I stopped the car a short rest.

Yifu library was named ____ a businessman devoted to China’s education[ ]

Have you finished your work yet—No，not yet. I thinkit’ll take ________ minutes.