geles Times reported that researchers may have found a way to ______ human life by changing certain genes, so that humans might expect to live twice as long.

Did Jack marry last year——– Yes. He ________ a teacher.

Everyminutemust_______fulluseof_____ourlessons.

This pair of shoes _______ hand, and it ______ very comfortable.

For _____is this book written —It’s written for young kids.