__________ Tom didn’t pass the exam made his parents very upset.
| A．Which | B．What | C．That | D．When |
It’s quiteme why such things have been allowed to happen.
| A．for | B．behind | C．against | D．beyond |
—The authors of computer viruses are geniuses.
—I agree. If they applied their wisdom to other net technologyhuman beings can benefit, it would be better.
| A．in which | B．through which | C．from which | D．during which |
The winter of 2008 was extremely bad.most of people say it was the worst winter of their lives.
| A．In general | B．In a word | C．In all | D．In fact |
No one helped me . I did it all myself .
| A．for | B．by | C．from | D．to |
To understand the grammar of the sentence，you must break it______ into parts．
| A．down | B．up | C．off | D．out |