The idea for the new plan came to his mind, ________to his experiment in the lab.
| A．while devoting | B．while devoting himself |
| C．while he was devoted | D．while devoted |
The experiment, _____ to test the theory, will be carried out tomorrow.
A. intendingB. intendedC. to intendD, having intended
Would you please speak ____ a loud voice? I didn’t catch what you said, with all the noise going on.
| A．in | B．on | C．of | D．to |
Only when I lost the opportunity to take my first job ____ how important it was to me.
A. I realized B. I had realized C, had 
I realized D . did I realize
_____ is known to us all is that to work hard to achieve a goal is more important than only to have a goal.
| A．What | B．As | C．it | D．This |
------ Ian gave up playing the piano eventually.
-------It’s just_____of him to spend all that money on the equipment and then lose interest halfway through the course.
| A．normal | B．ordinary | C．common | D．typical |