The police are________to conclude that the cause of fire had been a cigarette end.

They think the room is________, but as a matter of fact it is already occupied. 

 The heat in the desert is__________; therefore there are few plants growing there.

It is_______ that I can still remember_______ was discussed at the meeting. 

— Jack has spent an hour in the shoe shop．Hasn't he decided which pair of shoes to buy?— Maybe．Young as he is, he is         about his appearance．