While walking around the Xixi National Wetland Park, I found there were tens of thousands of people, young and old, ______ for the flower festival. Beautiful indeed!

Help ____ to the chicken, Tom and Jim.—Thank you.

When he is free, he often helps his parents ________ some housework.

ou know where Miss Gao is I couldn’t find heranywhere.— She ________ have gone far, for her coat is stillhere.

It’s difficult to ___ these old books for some of them ______ none of the classification.