15. An awful crash between an express train and a bus _____ , however, occur the other day in Russia.
A. does B. did D. has to D. had to
-The weather isn’t good enough for an outing，is it?
-To much dust．We can’t haveat this time of the year．
| A．a worse day | B．a worst day | C．a nicer day | D．a best day |
Subway Line 4，into use in September 2009，has made traveling in Beijing easier．
| A．having been put | B．putting | C．being put | D．put |
-Tom，you are smoking again?
-? It’s none of your business．
| A．Why not | B．what for | C．So what | D．How come |
Any applicant form ______ properly will not be accepted by the company．
| A．not to be filled | B．not filled | C．not being filled | D．not having been filled |
His story of the accident does not make any．He is telling a lie．
| A．difference | B．sense | C．excuse | D．point |