We used to see each other___,but I haven’t heard from him since last year
The sun has set and we walked as fast as we could, __________ to get there before it was dark.
Believe it or not, if you learn to be independent ________ your family, you shall survive __________ any disaster in store for you.
I agree with most of what you said, but I don't agree with __________.
A few __________ looked at him curiously when he suddenly stopped and burst out crying.
With so many children playing outside and making so much noise, he seemed unable to __________ on his homework.