长期、大量的顺差可能致一国货币供应量( )。

A．不变

B．上下波动

C．过多

D．减少

It wasn’t ________ they found that there was much trouble ________ the plan.

A．long before; to carry out

B．long before; carrying out

C．before long; with carry out

D．before long; in carrying out