Don't you think _______of great importance that we should keep fit by taking exercise regularly?
| A．this | B．that | C．which | D．it |
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 |
11．Some great people said it was their primary school teachers that they were fond of_____influenced their whole lives．
| A．what | B．who | C．as | D．Which |