______________ with the sun, the earth is not big at all.
| A．Comparing | B．Compared | C．To compare | D．Compare |
It was after he went to college __ he realized the importance of forming a reading habit.
| A．that | B．when | C．since | D．as |
— I'll come to listen to your speech at 9:30 tomorrow morning.
— I regret to tell you that by then my speech ____.
| A．had ended | B．has ended | C．will have ended | D．will end |
_____ is the population of China? It is about 1,300,000,000.
| A．How many | B．How much | C．What | D．How |
Some doctors suggest that vinegar will ____ people from being infected ___ H1N1.
| A．protect; to | B．prevents; from | C．prevent; with | D．protect; in |
Our school is no longer ____ it was 10 years ago, _____ it was not well equipped.
| A．what, which | B．that , which | C．what, when | D．that, where |