1．The young man failed ________ and lost interest in ________ of his research.
A．much times；much B．many times；many
C．many times；much D．much time；many
解析：time作“次数”讲时，为可数名词；research作“研究”讲时，为不可数名词，只能用修饰不可数名词的much来修饰，因此本题正确选项为C项。
答案：C
2．You are not permitted________in public places.
A．spitting B．spit C．to spit D．spits
解析：permit sb.to do sth.变成被动语态，应该为sb.be permitted to do sth.，所以答案为C。
答案：C
