Since then, finding ways to grow more peanuts ______ his life goal.

—Ann asked me to remind you of the meeting this afternoon. Don’t forget it!—OK, I     .

When I was in primary school, I was told that the earth ______around the sun.

This kind of picture stories    worth reading , but novels of that kind    not worth reading . 

 Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.