Darwin counted 225 flowering plants, ______ he collected and brought home 193.
I've always smoked, but I'm trying to __________.
Anything __________ could be found has been used to repair the damaged bridge.
If the way __________ you think of is not good enough, you can learn the way __________ the top students deal with their study.
The doctor did __________ he can __________ the boy.
I'll never forget the day __________ we worked together.