【单选题】Positive surprises from government reports on retail sales, industrial production, and housing in the past few months are leading economists to revise their real gross domestic product forecasts upwar...
A.
their government is announcing the end of a recession.
B.
US economy is showing some signs of an upturn so soon.
C.
some economic sectors have become leading industries.
D.
they have to revise the product forecasts so often.
【简答题】Government reports, examination compositions, legal documents and most business letters are the main situations ________ formal language is used. A) in which B) on which C) in that D) at what