─What’s the girl doing?    ─She ______ a bike.

I’ll have an interview tomorrow, so I need to get my shoes _________.

—Sorry, I’m late. Has the meeting begun?—It doesn’t matter. The meeting        for several minutes.

The work is too difficult for Mr. Zhu to finish in a week. He needs ______ days.

When I passed the river, I saw some children ______ on the sand.