—_______? —Yeah, it seemed a little confusing to me at first, but now I get it.
If the balance of nature is ____ , a series of problems will arise .
.This is Mr. White , ____ I think has something interesting to tell you .
---- Will Thursday or Friday ____ you ? ---- Either will _____ .
This will not only keep the study habit ____ but also keep you up to date on your class assignments .
. I ________ to go for a walk , but someone called and I couldn't get away .