Because the manager had some important guests to meet, the meeting only _____ a few minutes.

---Tom, keep your_____ on your studies. --- Sure, mum. I'll keep that in_____.

--- What are you reading there, Susan?   --- Nothing interesting. I am just ________ the pages to kill time.

.The Red Army ____ more than 25,000 li and arrived at North Shanxi at last.

The electricity ____, the light went out.