After climbing the hills in the natural park for hours, my legs _   under me and I failed to keep pace with others．

The little girl________the bus as soon as it stopped，but to her disappointment，there were no seats left.

He came to my lecture every week, but his look  ___  that he was not really interested.

The beauty of the place ______ them to pause in their hike and rest a while.

At the meeting, many problems     , which mean we still had a long way to go.