He made another wonderful discovery,_____ of great importance to science.
| A．which I think is |
| B．which I think it is |
| C．which I think it |
| D．I think which is |
---It seems that you are familiar with this city.
---I _____ English in a high school here for three years. It’s grerat to be back!
| A．have taught | B．taught |
| C．have been teaching | D．had taught |
The news shocked the public, _______to great concern about students’ safety at school.
| A．leading | B．having led |
| C．to lead | D．led |
I’ve tried very hard to improve my English. But by no means ____with my progress.
| A．the teacher is not satisfied |
| B．is the teacher satisfied |
| C．is the teacher not satisfied |
| D．the teacher is satisfied |
Our teacher demanded that all of us ______ English every day.
| A．should practise to speak | B．would practise speaking |
| C．could practise speaking | D．practise speaking |
---Why do you want to work for our company?
---This is the job that I _____ for.
| A．looked | B．am to look |
| C．have been looking | D．had looked |