— It’s dangerous to walk across the street carelessly.— You’re right. We can’t be careful while crossing the street.
I __________ my pen everywhere, but I didn't find it.
-The light in the office is still on. -Oh, I forgot __________.
The socks are cheap(便宜的), I’ll________ it.
Could I borrow your car? I'd go downtown. ___
__we didn't get seems better than __we had.