【单选题】A family of five is really a heavy burden, so we all have to work hard to________.
【简答题】A.Heavy homework loads. B.Long hours' work without play. C.Carrying heavy backpacks. D.None of the above.
【简答题】Comment briefly on the contribution Sherwood Anderson made to American literature.
【单选题】He seems too ___ to do the heavy work.
【单选题】17世纪初,被称为“近代科学之父”的哲学家是()