用括号中所给动词的适当形式填空：(1)This dog ____(not need) a new home.(2)Do you still remember
继续 remember when we first ____(see) him?(3)We ____(save) a lot of lost dogs since 2007.(4)Don't worry,I ____(look) after the puppy.(5)People ____(keep) dogs for millions of years.(6)Hundreds of years ago,dogs helped Early Men ____(hunt) animals for food