还在对着GMAT语法难题不知如何是好?北京新东方GMAT教师周谢慧和王燚在此为大家带来详细的题目解析。

　　(GWD-TN-1-32) To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

　　A.have to know a great deal more than now about the social and economic

　　B.have to know a great deal more than they do now about the social and economical

　　C.would have to know a great deal more than they do now about the social and economical

　　D.would have to know a great deal more than they do now about the social and economic

　　E.would have to know a great deal more than now about the social and economical

　　以上是北京新东方GMAT教师周谢慧和王燚为大家带来的关于GWD-TN-1-32的详细解析。

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