The time he has devoted in the past 10 years________ the disabled is now considered________ of great value.
Don’t turn off the computer before closing all programs,________you could have problems.
I was glad to meet Jenny again,________I didn’t want to spend all day with her.
There’s no way of knowing why one man makes an important discovery________another man,also intelligent,fails.
I have heard a lot of good things about you________I came back from abroad.
She says that she’ll have to close the shop________business improves.