Betty: Hey! My legs are aching. How far have we walked?
Mr. Jackson: About 10 kilometers. Let’s wait for the others. They’ll catch up in a few minutes.
wait for
catch up
catch up with
Lingling: Who’s missing?
missing adj. 失踪的，下落不明的；在句中作表语/ 定语
Betty: Tony and Daming. What’s happened to them?
