It is already well understood causesthe global warming.

Parents are coming back, and you’d better________these things, or the room is in a mess.

I’d appreciate ______ if you would like to teach me how to use the new computer.

I hadn’t seen her for 10 years, but I ____ her at once.

ind of job have you ever done before–Oh, I _________ for an engineering company for threeyears,