._______ with the present situation, the local government could not find effective measures to reduce the risk of coal mine accidents.
It was back home after the experiment.
He kept looking at her, wondering whether he her somewhere.
---How long has your brother been working here? ---_______ he graduated from college in 2007.
Tom insisted what he said ______ true, but we insisted that he _____ and have a look.
I’d prefer ______ in the office rather than ______ at home watching TV.