He had to take the medicine three times a day, so as to be _____ the pain in the leg.
_______ his research, man can set foot on the moon now.
The rest of the apple _________.
Only when his mother arrived ___________.
–Do you know the ____ woman by the chairman? --Yes. But could you introduce to me the man _____ by the reporters?
Suddenly it ____ me that if I let him go, he would never come back again.