While studying， fix your mind on what is really important， or you will
remembering nothing.
| A．take up | B．lead to | C．stick to | D．end up |
Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.
| A．producing | B．having been produced |
| C．to be produced | D．produced |
Father finally came back home, which I ___ forward it.
| A．had been looking | B．have been looking |
| C．looked | D．have looked |
. Information has been put forward ___ more middle school graduates will be admitted into universities.
| A．while | B．that |
| C．when | D．as |
Determination is a kind of basic quality and this is ___ it takes to do jobs well.
| A．what | B．that |
| C．which | D．who |
____ in her best suit, the girl tried to make herself ____ at the party.
| A．Dressed; noticing | B．Dressing; noticing |
| C．Dressed; noticed | D．Dressing; noticed |