—What’s Jack up to in the shoe shop? He’s there for ages.—It’s ______ that he hasn’t decided which pair to buy.

Who do you think is the greatest man _______?

Mr Smith, looking ______, started to work out a        problem.

Having worked for as long as ten hours, the young man lay on the ground, _____.

---Did you have a sound sleep last night? --- Yes, never slept ________.