When travelling in buses or trains, we are likely to have conversations _____ we give information or opinions about different things.
A. where B. which C. what D. when
a written permission, he had to write another letter to the president of the university.
A．Not giving B．Not having been given
C．Having not given D．Having not been given
--- Have you heard that Jones, along with her parents, to Hainan for the winter vacation?
--- Really? No wonder I haven’t seen her these days.
A．had been B．have been C．has gone D．have gone
There’s growing unrest among the poor and unemployed. The media points out that it’s the government that should have a lot to ________.
A. answer for B. stand for C. go for D. care for
The traffic problems we are looking forward to seeing _____ have attracted the government's attention．
A．solving B．solve C．solved D．to solve
—Have you seen your aunt lately?
—Yes, in fact I saw her yesterday．I __ her for several months．
A．haven't seen B．didn't see C．hadn't seen D．don't see
