While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color. a ,/ B. a ,the C. /, the D. the ,a
Jane was writing a letter _________ the other fans were watching a live television program.
We thought Mary would be elected cheerleader, but to _________ she failed.
The student, _________ the first place in the piano competition, is considering _____ abroad to learn classical music.
—Could you do me a favor?—It depends on _________ it is.
He often depends on others. _________,he doesn't do things by himself.