_____ we gave him something to eat, he would save it up for his little sister.

I failed again，but my parents encouraged me and told me that failure________the mother of success

These children decided to _______ as cute animals and perform a new play.

If Jim ______ free tomorrow, I will ask Tom to go instead.

Is it interesting to play computer games—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.