o cause people some health problems, infact far more serious _____ than computers do

Helen hasn ’t shown up so far.It’s five past seven.— It’s________of her to keep others waiting.Now，let’s go.I have no patience.[ ]

What good weather! Let’s go boatingon the lake.—__________.

Is Andy from USA—No. He is from England.

In their efforts to persuade us to buy that product, shopkeepers have made a close study of human nature and have_______ all our little weaknesses.