It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.

问题描述:

It is really quite extraordinary that we should have been at the same college without ______ before.a.met    b.being met    c.ha ving met    d.having been met

答案是C
without 后面是个句子做定语.without + doing.