It was only 3 hours      the policeman caught the robber.

— Should people stop using their cars and start using public transport?— __________. The roads are too crowded as it is.

There is no________ that students will listen attentively in class, if they are _____ The World Cup in South Africa at night 

-----Who do you intend to have______your computer?  ----- I haven’t decided yet. I wonder if you could help me。

---You shouldn’t have taken pictures before the carved stones．---____ .