—Did you meet the editor at the airport? —No, he _______ away. I guess he’s in danger.
I'll be busy on ________ Sunday morning, and perhaps I'll have ________ late night.
It is high time that we started to consider what ________ we should take to reduce heavy smog caused by traffic fumes and other pollutions.
________ walk is expected to last all day, so bring ________ packed lunch.
In recent years, many mainland residents have rushed to Hong Kong to buy baby milk powder due to their ________ about its quality.
One hundred thousand years ago, ________ choice was simple when it came to ________ drink—there was no choice. It was water or nothing.