Which sentence is wrong?
| A．I felt it impossible for him to take the exam. |
| B．I found it impossible that he might take the exam. |
| C．I thought that he might not take the exam. |
| D．In my opinion he might take the exam. |
28. I don’t think you’ve quite__the seriousness of the situation. You seem to know nothing about it.
| A．recognized | B．mastered | C．grasped | D．Seized |
20．The river, ________ banks are covered with trees, is beautiful and it attracts many water birds.
| A．whose | B．what | C．of which | D．which of |
19．From this year’s poor results, one can see ______ many changes have been made in the football team and that, sadly, it is no longer ______ it once was.
| A．that; what | B．what; that | C．what; when | D．that; where |
18．______ everyone knows, John has made his promise to his parents ______ he will never play computer games again.
| A．As; which | B．As; that | C．It; that | D．It; which |
17．The movie is to deucate people about environmental problems ______ our planet.
| A．threatened | B．being threatened | C．threatening | D．to be threatened |