Who do you think is the man you are going to turn for help when you are ?
| A．who; in danger | B．to whom; in trouble | C．with whom; in danger | D．for whom; in trouble |
As ________ clear from his manners, he seems to be much of a scholar.
| A．being | B．is | C．if | D．though |
While he was investigating ways to improve the telescope, Newton made ____ discovery which completely changed ________ man’s understanding of color.
| A．a ; / | B．a ; the | C．/ ; the | D．the ; a |
He never does anything wrong. He should be the ________ to blame.
| A．least | B．last | C．worst | D．best |
Reading provides the mind only with materials of knowledge; it is thinking that makes ________ we read ours.
| A．that | B．what | C．which | D．it |
We have done things we ought not to have done and ________ undone things we ought to have done.
| A．left | B．leaving | C．will leave | D．to leave |