8. He was so deep in thought, thinking of the problem ______ he knocked into the tree without noticing it.
| A．when | B．while | C．because | D．That |
7. In Beijing Olympics, Michael Phelps swam into Olympic history, ______ the first athlete to win the most gold medals ever.
| A．became | B．becoming | C．becomes | D．to become |
6. He is a talkative man, but he didn’t say a word in today’s discussion. I am not sure how to ______ his silence.
| A．treat | B．master | C．read | D．Grasp |
30. Chinese food always gains ____________ from people all over the world.
| A．approval | B．appreciation | C．attraction | D．Agreement |
29. -- I have never dreamed of__hope of succeeding in carrying out the experiment. Isn’t it a dream?
-- ________.
| A．there was / Celebrate you to your success | B．there is / Celebration on your success |
| C．there being / Congratulations on your success | D．there having / Congratulate you |