(6分)常温下将0.010molCH₃COONa和0.004molHCl溶于水，配制成0.5L混合溶液。判断：

①溶液中共有     种粒子。

②溶液中有两种粒子的物质的量之和一定等于0.010mol，它们是     和      。

③溶液中n（CH₃COO^-）+n（OH^-）- n（H⁺）=         mol。

The house rent is high. I’ve got about half the space I had at home and I’m paying ________ here.

A．as three times much

B．three times as much

C．much as three times

D．as much three times