it's vital that enough money----collected to get the project started.a.isb.bec.mustd.can be
问题描述：
it's vital that enough money----collected to get the project started.
a.is
b.be
c.must
d.can be
答
根据语境来看应该选d
答
选B, It is vital that +(should)动词原形,这是虚拟语气．