今年五月，长江中下游遭遇严重干旱。下列缓解旱情的做法不正确的是

A．推广使用节水器具

B．工业用水重复利用

C．用增雨剂实施人工降雨

D．引渡海水灌溉农田

As is reported, it won't take a long time ____ the 20th Golden Rooster and Hundred Flowers Film Festival falls in the Binhu New Area. Hefei.

A．since

B．when

C．before

D．that