The idea for the new machine came to Mr. Baker ______ to his invention recently.
| A．while devoting | B．while devoted |
| C．while he was devoted | D．while devoting himself. |
The glorious moment would live in my mind ________ our football team won the championship.
| A．when | B．where | C．that | D．which |
According to the latest BBC news, a five-year-old boy from England _______ the youngest computer specialist in the world．
| A．became | B．becomes |
| C．had become | D．has become |
---You seem busy these days．
---Yes．I’m writing a story．You know, it’s really not easy to write _______ with attractive plots.
| A．this |
| B．one |
| C．it |
| D．that |
With doubts _______ through my mind, I felt it necessary to carry out a research.
| A．to run | B．run |
| C．running | D．having run |
Every Monday, my English teacher would cheerfully ask me _______ my weekend had been.
| A．that | B．if | C．what | D．how |