--- You needn’t take an umbrella. It isn’t going to rain.(2013北京)--- Well, I don’t know. It do.
He usually goes to work by bike _______ it rains.
She knew nothing about his journey _______ he was likely to be away for three months.
---- “How did the robber get in?” ----“______ an open window on the first floor.”
_______ reading the letter, what has he done?
_____ their inexperience, they’ve done a good job.