Mary came late not ___ the heavy rain, but ___ she was ill.
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.