A new teachnique ____the yields as a whole increased by about 30 percent.
| A．had applied | B．having applied | C．to have applied | D．having been applied |
What’s the matter with John? He has been sitting there for hours.
— A postcard from his father_______ an attack of home-sickness in him.
| A．took up | B．set off |
| C．brought in | D．built up |
The Most Beautiful Village Teacher, hosted by CCTV, honors the teachers __________valuable contributions are worthy to be respected by every Chinese.
| A．of whom | B．of which | C．that | D．whose |
— Pity you missed the lecture on nuclear pollution.
— I____ it, but I was busy preparing for a job interview.
| A．attended | B．had attended |
| C．would attend | D．would have attended |
—I hear that Jason is planning to buy a car.
—I know. By next month, he _enough for a used one.
| A．will have saved | B．will be saving |
| C．has saved | D．saves |
---John has put forward______ most challenging question for us to answer.
---Yes, it really is. I have never heard______ harder one.
| A．a; the | B．the; the | C．a; a | D．the; a |