—What shall we do tonight then?— —whatever you want.
—Why are your eyes so red? You ________ have slept well last night. —Yeah, I stayed up late writing a report.
Some young people these days just ________ go out of their homes to contact the real world.
Why ________ it get colder when we climb up a mountain? We are getting nearer to the sun!
I ________ to my cousin's birthday party last night, but I was not available.
If we ________ a table earlier, we wouldn't be standing here in a queue.