—How amazing it is that astronauts are exploring outer space!—It's a challenge, I guess, ______ man against nature.
If only I my watch!
--- What will you do during the summer holiday? --- I don’t know, but it’s high time something.
I’m glad I went over all my notes, otherwise .
--- Have you ever been to Beijing? --- No, but I wish I .
You come earlier. The bus left a moment ago.