After ______ seemed an endless wait, it was her turn to enter the personnel manager's office．
| A．that | B．how | C．what | D．why |
16．It is usually not quite cold in this area in March，but sometimes temperature_______low．
| A．should | B．must | C．can | D．Shall |
15．Jack was once a common name，___________,I think, that is seldom chosen nowadays．
| A．it | B．one | C．who | D．Which |
14．-The weather isn’t good enough for an outing，is it?
-To much dust．We can’t have__________at this time of the year．
| A．a worse day | B．a worst day | C．a nicer day | D．a best day |
13．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 |
12．-Tom，you are smoking again?
- ________? It’s none of your business．
| A．Why not | B．what for | C．So what | D．How come |