You can never be __________ when crossing the street.
| A．very careful |
| B．too careful |
| C．carefully enough |
| D．enough careful |
22. Dr. Frank failed many times but he finally_______to find a successful way to solve the problem.
| A．broke off | B．broke up | C．broke down | D．broke through |
第二部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21.The bird ______ its wings and flew to the south.
A. beat B. hit C. strike D. Struck
35. Every weekend, Mrs Green asked her daughter to visit the museum in order to ________ her interest in science.
| A．grow | B．build | C．make | D．develop |
34. We knew we were getting close to the park____we started seeing the tiger right next to the road.
| A．when | B．before | C．while | D．Until |
33. With a great weight _______off her mind, she passed all the tests successfully.
| A．taken | B．taking | C．being taken | D．to be taken |