Life is limited. We had better _______ it on valuable things.—Good idea. And we should spend more time ______ our family members.

It was careless of Lucy to________ the same mistake once again.

Leonardo da Vinci ____ birds kept in cages in order to have the pleasure of setting them free.

How can you say so about my boss?— Don’t get me wrongI _____ ill of him

The spacecraft has never been to the moon, ________ ? —Certainly.