86. The river is too deep; we can’t _______ it.
| A．go | B．cross | C．across | D．Through |
The so-called Asia—Pacific century will make no sense_____ China develops．
| A．unless | B．when | C．if | D．as |
Whether you like it or not，we live in a community_____ on--line chatting is an important part of communication．
| A．which | B．that | C．when | D．where |
The No．1 underground，hopefully_____ in the near future，will greatly improve the traffic conditions in Fuzhou
| A．opens | B．to be opened | C．open | D．will be opened |
With the word“PM2．5"_____ appearing in media reports，people pay greater attention to it and seek health tips for smoggy days．
| A．constantly | B．instantly | C．rarely | D．directly |
一What if you_____ to send an essay with your application?
一I would have been rejected．
| A．forgot | B．would forget | C．had forgotten | D．should forget |