问题
选择题
Without Sir Tim, the father of www, keeping up with the latest ______ so convenient.
A．would be
B．wouldn’t be
C．would have been
D．wouldn’t have been
答案
答案：B
这题考查虚拟语气，without Sir Tim是隐含的虚拟条件句，相当于if it were not for Sir Tim,所以主句用和现在相反的虚拟语气，would（n’t） be，根据句意：没有Tim先生，万维网 之父，跟上最新信息就不会这么方便了。选B。
和Cr
),其流程为:Cr
Cr2
Cr3+
Cr(OH)3↓
Cr2
Cr3+(aq)+3OH-(aq)
Cr2