There has been a great increase in retail sales , ____﹖
| A．does there | B．isn't there |
| C．hasn't there | D．isn't it |
We don’t have to ________ every word that we don’t know when reading.
| A．look up | B．refer to | C．look for | D．look into |
We’ll discuss the problem ________ lunch time.
| A．at | B．over | C．of | D．when |
It was _______ he does _______ makes his students enthusiastic about school. (原创)
| A．that; that | B．what; what | C．that; what | D．what; that |
The number of people who speak English ______ large, and a large number of people _______ native speakers.
| A．are ; are | B．is ; are | C．is ;is | D．are ;is |
Only when he failed the exam ________ that he didn’t work hard. (原创)
| A．he regretted | B．did he regret | C．had he regretted | D．does he regret |