Question

— It’s said that       dam is under         construction.
— Yeah. It will take about half a year.

A．不填；不填

B．a; 不填

C．a; the

D．不填； the

Answer 1

B

考查冠词的用法。“据说正在建一座大坝。”“是的。要用半年的时间。”under construction“在建设中”；泛指“一个”大坝，用不定冠词a。故选B。