Not all men are equal each other ability.
He _______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
—You needn’t take an umbrella. It isn’t going to rain.—Well. I don’t know. It _______ do.
Cars do cause us some health problems—in fact far more serious _______ than mobile phones do.
Her mother was ill so she had to look after her________.
You’ll have to wait for one more week,________ the manager will be back from his trip.